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"What I wish for is a burning era in which people seethe with ambition. Show me your strong spirit!"
Seireitou Hyūga (日向 精霊塔, Hyuuga Seireitou) is a legendary shinobi that hails from Konohagakure, born into the main branch of the prestigious Hyūga Clan. Despite his noble lineage, the unusual white hair of which he was born with set him apart from the other Hyūga, subsequently leading to him being shunned as an outcast, as the elders of the clan understood it to be an atavism trait of Kaguya Ōtsutsuki; fearing that it was an omen signaling her return to this world. This was eventually proven true once it had been revealed that Seireitou is the sole transmigrant of the rabbit goddess herself. Possibly derived from those circumstances, he took on the title of "Shiroyasha" (白夜叉, White Demon), a name known and feared throughout the world, written within every shinobi's Bingo Book, due to his involvement in the Second Shinobi World War; his silver hair, as the story goes, was drenched in such blood that he gave off the appearance of a demon dashing through the fields of combat. It is known that Seireitou originally served as the leader of Team Seireitou, a Genin squadron consisting of Might Guy, Ebisu, and Genma Shiranui. He is the husband of Tsunade, whom he married eight months following his promotion to Hokage, and they had conceived two children named Kagura Hyūga and Sayuri Hyūga.
He is the Sixth Hokage (六代目火影, Rokudaime Hokage; literally "Sixth Fire Shadow"), having acquired this position after replacing and subsequently succeeding Tsunade. As the Hokage, he resurrected the formerly disbanded ANBU Root and placed Sasuke Uchiha as the head of its operations. He had also founded the Oniwabanshū, a secretive Anbu organization with darker purposes. Oichi Oda served as his personal right-hand-woman. He is renowned as the one and only true successor to Hagoromo Ōtsutsuki's Ninshū, having learned its most deepest secrets and subsequently turning it into a craft all his own. Though, this is but a mask, worn by the most dangerous of all criminals in all the shinobi world. And yet, for such a status, his name has never found itself in any bingo book or wanted poster, with any title other than "Hokage" and "War Hero" to describe him. His influence runs so deep, yet he is but a faceless miscreant mastermind, leading an empire of vast proportions that even the five nations would lack the manpower necessary to apprehend and halt the entirety of his methods, with naught a single one privy to the true identity of their benefactor; the one they know solely by the epithet "Devil King of the Sixth Heaven" (第六天の魔王, Dairokuten no Maō). Seireitou bears blood that carries an evil strain, saturated with the intensity of his Ōtsutsuki predecessor, rendered infinitely more dangerous by the great powers of both unsurpassed academic intelligence and legendary abilities in the art of war. It can be said with absolute certainty that he is, indeed, the most diabolical of criminals.
Born in Konohagakure during the start of the Second Shinobi World War, Seireitou was a member of the prestigious Hyūga clan's main branch. He was born with an unusual white hair, something considered unheard of in the Hyūga. Among the elders, it was considered an ill omen; the return of a dangerous figure in history and the origin of the Hyūga bloodline: the Rabbit Goddess, Kaguya Ōtsutsuki. It was believed that his strange white hair, something that had never happened in the long recorded history of the Hyūga clan, meant that he was the reincarnation of Kaguya herself, as the white hair was believed to be an atavism trait that would only come about in the descendant that was her true transmigrant. This fear spread to the entire Hyūga clan, and it was soon an accepted thought among them all that Seireitou was a "demon child" (悪魔の子, akuma no ko) and signaled the return of the Rabbit Goddess Kaguya; a figure so powerful and frightening that she is regarded in both ancient and modern lore as the most diabolical criminal to have ever existed. Believing that Seireitou's birth signified her return to this world, he was considered an outcast by his own clan, despite his noble status as an offspring of the main branch. His own parents shared the clan's sentiments. Eventually, even the villagers of Konoha themselves began to feel the same way, despite constant attempts by the Second Hokage, Tobirama Senju, to urge them to cast aside their superstitious fears. The constant look of anger, fear, confusion, and utter hatred focused on Seireitou throughout his entire childhood warped the young Hyūga's psyche into a cold demeanor; refusing to get close to others and became secluded, withdrawn from the world, as he found his own housing on the far outskirts of the village where few resided, doing his best to survive on his own.
Sometime later down the road, the battles between Konohagakure and Kumogakure had escalated due to the support by the Hyūga Shinobi on the side of the Leaf. It was at this point that the higher-ups in Kumo hatched a plan to kidnap one of the Hyūga children and use their powerful Dōjutsu for their own purposes. They had heard stories of the young Hyūga outcast that lived on his own and believed that it was their best chance at kidnapping a Hyūga for experimentation into their Byakugan. They had eventually succeeded, locating the young Seireitou and securing the capture as they prepared to return him to their village. However, as they began to leave the Land of Fire, something had occurred within Seireitou. A spark of rage initiated inside the young boy, and within an instant, he stood over the bloody remains of his kidnappers; having no recollection of what had just transpired in those few moments. His eyes were etched with the appearance of the Byakugan, but the image soon disappeared when the men fell to their deaths. Frightened and shocked at what he had just caused, he sat in the blood-riddled grassy plain, clutching his forehead trying to comprehend the situation. Seireitou had noticed a sword in one of the dead Shinobi's possession, and took it, hoping to be able to protect himself with it as he sought refuge. Months had past as the war in the background had continued with no end in sight. Seireitou, a little over ten years old, had wandered aimlessly around the Land of Fire's underdeveloped areas, slaying innocent people around and stealing their possessions, using the sword he took from the dead Kumo ninja.
One day, after killing a man, and sitting down near the corpse, eating a ball of rice he took from the bentō box of the former, a wanderer by the name of Shōyō Kawahiru approached him. The latter spoke kind words to the quiet young boy, stating "I arrived here after hearing about a corpse-eating demon... Would that be you? A rather cute demon. Did you also take that from a corpse? A lonely child stealing from corpses in order to protect himself, is it? That's very impressive. However, you will no longer need that sword. A sword that is swung only in self-defense, while fearing others, should be thrown away. I shall give you my sword. If you wish to properly learn how to use that sword... then come with me." He noted that villagers around the Land of Fire had mentioned a "demon-like" presence in the forests, slaying any civilian that dares cross its path. But never expected to find "a cute demon", much to Seireitou's distain, as the latter drew his sword which had rusted from the blood of the people he had killed over the past couple years. Shōyō stated that he shouldn't be using a sword that has rusted due to being misused, and that a sword should only be wielded to "protect one's soul". It was later revealed that Shōyō was a shinobi in service to Konohagakure, an advisor to the Hokage Tobirama, and was aware of Seireitou's reputation there as the reincarnation of Kaguya. However, even so, Shōyō did not fear the boy, stating that he wasn't a "monster", but just a "little boy". Seireitou, having never experienced such a feeling of understanding from another person before, was able to warm up to the man and eventually came to see the man as a father figure. Shōyō returned with the boy to Konohagakure, where villagers stared at Shōyō with anger at how he allowed this boy to return to their village, but the man paid their fears no heed. He persuaded Tobirama to assist in bringing Seireitou to the village's academy, where he could begin training in the shinobi arts. Within just a year, Seireitou managed to learn to use the Byakugan naturally and even without being aligned with the Hyūga clan, managed to self-teach himself their Gentle Fist techniques. However, despite his efforts, the village still saw him as but a demon child that would one day desire to control the entire world through fear, just as his ancestor Kaguya had done. But with Shōyō's support, Seireitou found peace of mind, despite their looks of hatred, and eventually rose to become a powerful shinobi in his own right. Even among those looks of hatred, he managed to make close friends with a boy named Ryun Uchiha, whom would become his closest friend and most sought-after rival.
What occurred beyond this point in time is still unknown, as Seireitou refuses to discuss it, although it appears that at some point, Shōyō died in a large house fire set aflame during the Third Shinobi World War. The young Seireitou could only cry out his sorrow as his teacher and caretaker burned to death in the large flames. This was the event that caused Seireitou to personally enter the front lines of the war and fought with such ferocity that his name as "demon" became almost second nature to him. His cold persona from childhood returned as he struck down the enemy without remorse. It was during the war that he met two others whom would later become invaluable allies: respectively Echo Uchiha and Hikaru Kurosaki. The four, along with Ryun, became famous and feared throughout the Shinobi world during the world, renowned as the four Yonkō. When the war had eventually ended, Seireitou and Ryun came to contemplate what it meant now that their beloved teacher had departed from this world. They came to two different conclusions, with Ryun whom wanted to destroy Shōyō's legacy with this rotten world, and Seireitou whom wanted to protect Shōyō's legacy. And this disagreement eventually resulted in the two engaging in the first fight between the two in which they sought to kill one another. It was during this fight that Seireitou managed to hear the voice of Kaguya deep within him, and came to the understanding that that stories and fears the villagers had were all true. He was indeed Kaguya's transmigrant. Once he understood, he could touch upon the precipice of his Byakugan's truest powers, and managed to fend off Ryun's Sharingan — the brutal battle ending in a bloody stalemate in which the two retreated, determined to conquer the other upon their next confrontation.
With his mentor dead and his childhood friend pursuing a different path than his own, Seireitou had no reason to remain within the village, and departed soon after his draw with Ryun. His travels eventually took him north, a land far beyond the reach of any shinobi during that era, as he soon came upon the Samurai Country.
- Still in Progress
As a young child, Seireitou had rather short and curly silver hair, but he grew it out long once he got older as a homage to his mentor, Shōyō Kawahiru. He is sometimes refered to as "Silver-Hairs" Seireitou due to his appearance. Like all Hyūga clansmen, he has blank white pupils. Seireitou's expression is often depicted as calm and peaceful, with an air of humility, although many people noted his bored look makes him appear as if he has "dead fish eyes". Seireitou's attire, during his tenure as a standard shinobi, would consist of the standard Konohagakure attire with flak jacket, symbolizing his status as a Jōnin. Afterwards, he took to wearing a white sashinuki hakama, tied by a wide black obi around his waist which keeps his mentor's sword fastened to his left hip; unlike most obi, it's belt ends hung downwards on the left side. Over this, Seireitou wears a long white robe that has large bell-shaped sleeves. Leading up to his shoulders, both sleeves sport a thick long black bar running down the length of each white sleeve; these black bars are also shown to be on his hakama, running down the length of his legs on the outer edges. It also possesses a white collar that is kept up, but only block the view of his chin area. In more recent times, he is shown wearing a more simple uniform, consisting a haori with a hood, hanging downwards and shielding his face from view when the hood is up, which is normally the case.
"I exist for what's interesting — puzzles, ideas, analysis — that which others could never comprehend even in the brutalities of their wildest fantasies. And I get off on it. It's become almost like a fetish, you could say. Breaking the cycle of this world is boring. It's like death. Stagnant, quiet... eternal nothingness. Death's not interesting. But to create chaos and force a new cycle to be born, changing the perimeters of the game entirely... Now, that is interesting. Maybe I just like going against the social norms. Everybody's preaching about "ending hatred" or some other kind of nonsense, it's fun to be a rebel and deviate from them. Or maybe I'm just an old crackpot. Isn't that something interesting to think about? Point being... What I want from this world is a challenge. Nothing else."
Seireitou is portrayed as loyal and dedicated, possessing a dry sense of humor and sarcastic wit. He is often seen throughout the story as helping people, mainly befriending and giving advice to several shinobi and samurai alike. He is a complex person with some rather difficult to understand views. Using a medley of quotations and beliefs, he is able to consistently shatter the ideals of a person he confronts, but never appears interested in making someone, as he says, "see things his way".
In the chapter that he is introduced, the viewer clearly sees what an eccentric character he is. He typically acts in a goofy, energetic and fun-loving manner; being able to cheer up even the depressed Ryun Uchiha at times. While on the surface, he acts in such a ridiculous manner, this merely masks his true personality. Seireitou appears to act mostly out of self-interest rather than any sort of philanthropy, initially comes off as a self-serving man, infamous among many of his colleagues and subordinates alike for the selfish and narcissistic aura he gives off; but to those who truly know him, he is a man that always attends to those who need him. He comes off to most as a sort of cocky layabout, shirking most of his duties, but quick to take action when it appears that his loved ones are in danger. Seireitou is expertly manipulative and prone to think several steps ahead of those around him, giving him a remarkable talent for making subordinates act exactly as he wishes despite appearing not to have had a hand in their decisions. However, while these traits do have a place in his real personality, much of his outward persona can perhaps be considered an intentional facade perfectly designed to cause those unfamiliar with him to underestimate his remarkable intelligence and ability. At the core, he is a remarkably devoted leader whose primary focus and personal duty is to pushing trainers to their absolute limits; both mentally and physically. Though he hides it well behind a veil of cynicism and self-importance, Seireitou is a man who cares deeply about the people who trust and support him and goes to great lengths to ensure their safety and well-being, even at the risk of his own. As a man with considerable knowledge and expertise, Seireitou considers himself a protector to those without strength and acts accordingly, earning the staunch loyalty of his most trusted compatriots.
It has been noted by Ryun that Seireitou houses two different persona. The first is his carefree demeanor, which is present consistently and makes up the majority of his personality and traits. However, he also possesses the trait of a brutal and unmerciful killer, characterized by his other moniker, Shiroyasha, meaning "white demon", in reference to his white hair covered in blood during the battles in the Second Shinobi World War. It has been claimed that these two persona are at war within Seireitou, and have been ever since the death of the latter's mentor. However, despite this claim, the "white demon" persona has been depicted several times before, most noticeably during the aforementioned war, when he was first given said title, and also shown whenever Shōyō is brought up in a negative or demeaning manner.
In the position of an instructor, Seireitou is known to be capable of unspeakable brutality, both physically and mentally. Furthermore, he isn't very considerate of another's feelings of self-adequacy lack-there-of, portraying his signature sarcasm. According to Saori Uzuami, whenever Seireitou says "Eh, I don't want to", his stubborness becomes unrivaled to the point where no amount of compensation can change his mind. One of his most defining traits is that he is very respectful of his teacher Shōyō, and out of memory of his teacher, he values the relationship between a student and their master above all others; becoming enraged that someone who would harm their student would call himself a teacher. Despite being a fearsome fighter with nearly unmatched skills, he uses the guise of a coward most of the time to avoid needless bloodshed. He is typically described by others as lazy, unmotivated, and useless. In contrast, however, those same people also seem to note his kind, responsible, and unpredictable self.
"Don't be stupid. Step back. This... isn't even close to over."
Seireitou operates under a unique nindō known as "the burden of the soul" (魂負担, tamashī no futan) which exists as the reasoning behind all of his actions as both a leader and an individual. It was a belief that the power used by a person is meant, not to defeat an opponent nor to protect one's self, not even to cut away one's weaknesses, but to protect one's soul. Subsequently, it is meant to protect one's own soul: their pride, their morals, and their beliefs; to never yield to the will of another. But most of all, to protect the fragments of one's soul, passed on to those that one would form bonds of friendship with. It treats the soul as an organ within the body that holds more significance than even one's heart or mind, and that as long as the soul exists, even if the body is crushed to pieces, one can keep fighting. This unrealistic level of indomitable spirit allows him to overcome challenges that initially appear to be futile. Although the term was not coined specifically by Seireitou, he would normally refer to that which he protects as "a burden that would be better off taken off his shoulders, but can't bring himself to do so."
"Consume everything... white-maned demon with the all-seeing eyes."
Being the sole known transmigrant of Kaguya Ōtsutsuki, the characteristics of her personality have strongly influenced Seireitou's own personality, even from his childhood when he was unaware of her existence. Even while displaying a physical expression demonstrating composure and positivity, those who are speaking with him can feel the cold chills up their spine. While not an inherently "evil" person, Kaguya's desire to use forceful and cruel means to bend the people of the world to her will in order to inspire peace through fear had warped her own personality into something completely dark and callous that had devoured her. These traits are shown through Seireitou most definitively in battle. His normally eccentric and peace-loving persona that is dominant within him is twisted into a cold aura of pure murder and a merciless desire to wreck havoc and chaos. While he is still in complete control of his faculties and has not lost any form of awareness, the drastic change in personality makes many believe it is almost as though Seireitou is actually two separate minds in a single body.
However, it isn't only in battle that these traits make themselves known. Although he is a proponent of peace and the strength of an individual's soul, he is not above the forceful means of bending people's will to suit his own agenda. This was shown famously at the end of the Fourth Shinobi World War, when he manipulated and cleverly managed to intellectually outmaneuver the Fire Daimyō and his entire council at a postwar meeting, so as to replace and succeed Tsunade as the Hokage. Subsequently, what followed this event is possibly the most cruelest example of Seireitou's dark persona and his ties to Kaguya. Following Tsunade's fall as Hokage and his promotion, he managed to entrap the powerful kunoichi and imprison her to a solitary confinement where none would be able to locate her, unbeknownst to all but two rogue individuals that he controlled through his genjutsu and were later killed; their existence erased in the minds of those that knew them. During this time, he put to work a variety of techniques that allowed him to break her down, emotionally and mentally, through presumed torture and brutal degrees of rape. After managing to tear down the will of the great Tsunade, he began the process of reworking her memories of her beloved deceased boyfriend, Dan Katō, in order to remove him completely and instead, associate the feelings and memories of him with Seireitou himself. However, he had to be careful not to interfere with key personality traits, otherwise others may have become suspicious. The entire process took eight months, a length that Seireitou stated took the longest of all his previous brainwashing methods on other individuals, as she was a kunoichi that had mastered chakra control and medical ninjutsu. Taming her to his whim would have been impossible if not for his abilities. But, for all the difficulty, it was a success. He completely rid the existence of Dan from her being and managed to will her entire being into accepting that she and he were in fact true lovers. Subsequently, he had to do the same to all others in the village that had known Dan, so as to make sure there would be no possibility of this method becoming unraveled. While it can be argued that he did this solely out of purely evil intentions, his true goal in doing so was to conceive and raise a child with Tsunade; taking advantage of her bloodline that was descended from the Sage of Six Paths, combined with his lineage from Hamura Ōtsutsuki, in order to produce a child that would be born with the bloodline necessary to create a "second Kaguya". This plan resulted in the procreation of two daughters, respectively named Kagura Hyūga and Sayuri Hyūga.
In many ways, her presence within him and his methods of speaking with her have been considered similar to that of the relationship shared by Jinchūriki and their Bijū. However, he is unable to form a dialect with her upon his whim as a Jinchūriki would be capable of doing, instead being able to speak with her within his subconscious passively while he is asleep.
Rivalry with Ryun
Seireitou is regarded as a legend, among those that reside within both the ninja world and the samurai world; an absolute force of nature so terrifying that even Tobirama Senju acknowledged a young Seireitou as having the potential to surpass his brother and Madara Uchiha, a prediction that was proven true even in the silver-haired man's early adult years. Even as a child, his ability to perceive the world and absorb knowledge of both technique and philosophy reached nearly Kage standards, something even his mentor, Shōyō Kawahiru, often remarked upon; considered a prodigy in every sense of the word, able to contend with even full-fledged shinobi with ease. His power and skills have reached levels where only Ryun Uchiha, his former comrade and a famous legend in his own right, is capable of handling him in combat on his own.
Through sheer ability alone, he managed to secure his promotion as Hokage, succeeding Tsunade following the end of the Fourth Shinobi World War. Acknowledged as the "White Demon" (白夜叉, Shiroyasha), due mostly in part to the strange coloration of his hair while also referencing his status as the sole transmigrant of Kaguya Ōtsutsuki, his legendary warrior repute echoes across nations and even worlds themselves; a being that could challenge the heavens themselves if he so dared.
Even during childhood, Seireitou was acknowledged as having an enormous potential of chakra within him, only revealing itself at times when his anger would reign supreme in which he could actually intimidate others by a mere glance filled with death. It could send chills up the spines of even adults that dared enrage the young boy. This was most likely due to the fact that Seireitou had both inherited the bloodline of the prestigious Hyūga Clan and was the sole transmigrant of Kaguya Ōtsutsuki, most likely acquiring the vast supply of chakra she had once wielded to rule the entire world with her ocular prowess; only becoming stronger and fiercer as time went by, following the long trek of training and experience that would lead to him becoming the Hokage. It is said to be unrivaled by those that came before and even those that came after, with only Ryun Uchiha, and a couple others that could be counted on a single hand, capable of matching Seireitou's might. The intense level of chakra he possesses is great enough that he can fight for days without tiring, as one of his legendary battles against Ryun was said to have nearly lasted an entire week straight before the two finally collapsed and the match ended with a tie. A mere stare at weaker opponents is enough to completely rip away a target's confidence to continue fighting while also rendering others incapable of even moving due to a subconscious inducement of fear. Furthermore, his release of chakra alone is enough to deter even the strongest of warriors from acting, causing structures near him to nearly collapse due to the strain. With a mere glance, his chakra can be riled up to produce an immense degree of pressure on the surrounding area, pushing back even those that are regarded as the strongest of their own village. Those that manage to remain composed enough to keep their head up quickly notice the mystic white chakra aura that surrounds Seireitou, making him appear almost divine.
Seireitou's control over his own chakra is regarded as one of the best; so refined and concentrated that it can be used for feats otherwise considered impossible. On one such occasion, he managed to actually insert a small piece of his own chakra within an opponent's Susanoo chakra flow, while in its unstabilized form, and commanded it to strike inwards toward the target.
Born into the Hyūga Clan's main branch, Seireitou possessed the lineage necessary to awaken the mighty powers of the Byakugan. Even from childhood, his abilities with the Byakugan exceeded his brethren, but he was still disregarded by them due to his strange white hair; something that was deemed impossible in all the years of Hyūga history. Regardless, he never stopped pursuing methods of enhancing his skills with the dōjutsu. His abilities with these eyes improved to a point where he could gaze into a person's eyes and quite literally look into their soul.
It was when he managed to understand his status as the transmigrant of Kaguya Ōtsutsuki that the truest powers of the Byakugan began to make themselves known. Its powers go far beyond that of merely enhancing the field of vision and granting the ability to perceive the tenketsu. The Byakugan, which is renowned as the "all-seeing white eye" (白眼の拝見全, Shirome no Haikenzen), possesses the power to read the flow of energy in all things, even the world's flow itself and how it behaves, operates, and even its future courses. It perceives all things in this universe in the most natural state: as mere flows of energy. The Rabbit Princess, whom first wielded the Byakugan's true powers, understood that its ability to perceive the world's flow around her and even the flow in all living beings was absolutely limitless. Using this incredibly power, she managed to enact the Infinite Tsukuyomi onto all individuals, as there were no limits when coming to being able to see everything around her. Seireitou, as her transmigrant, has managed to unlock these abilities and crafted them into his own.
As a Byakugan that has reached its pinnacle abilities, its field of vision knows no bounds. While normal users of Byakugan are only able to perceive their surroundings to certain distances and even possess the weaknesses of blind spots, Seireitou's Byakugan is one that knows no such things. It is literally an eye that carries the power of omnividence (derived from the latin word "omnis" meaning "all" and "videns" meaning "seeing"/"perceiving"), hinting to an almost god-like power that knows no equal when it comes to perception. It can even see worlds hidden to mortals, such as those dimensions that only the Rinnegan can influence and manipulate. It is what makes Seireitou and his rival, Ryun Uchiha, perfect opponents. If Ryun's Rinnegan is an eye that can influence all worlds, Seireitou's Byakugan is an eye that can perceive all worlds.
Seireitou is renowned as the "God of Taijutsu" (体術の神, Taijutsu no Kami), due to his foremost position as the master of martial arts in Konohagakure as well as other neighboring nations. While his technique varies between styles, as his central art is Gentle Fist, his physical capabilities demonstrated in his Taijutsu are top-notch. It is unknown if he uses the Body Flicker Technique, but his speed is capable of matching even that of a Shinobi using Lightning Release Armor. He is capable of effortlessly dodging simultaneous attacks at close range and the evasion of S-class techniques. In addition, Seireitou has a very large degree of physical strength, most commonly displayed by his ability to fight back his opponent's attacks with a single arm. One of the most frightening feats of strength he has displayed is an ability to hold back the physical attacks of an Uchiha's Susanoo, though only by a small degree. Through years of unusual training and life-threatening fights, Seireitou's physical prowess is one of the greatest, to the point that it is considered near-impossible to best him at close-range fighting. One of Seireitou's more noticeable traits is his tremendously skillful speed.
Revered as one of, if not the, greatest master of Gentle Fist, Seireitou makes common use of this art form in his Taijutsu. It involves the sealing of chakra points, or "tenketsu", through the user's own physical strikes. Dealing in the strict use of free-jointed circular movements, the steps of Bāguàzhǎng are often very unpredictable, and in when used by Seireitou, make it near impossible for an opponent to land a strike on him. In Bāguàzhǎng, footwork is key and when used to its highest levels, can allow the user to enter into an opponent's "blindspot" (殺し, Korui), something that is very rare for any hand-to-hand combatant to develop.
Seireitou has often stated that the very essence of the Hyūga's Gentle Fist style is to examine, understand, and manipulate the "flow" of energy between opponents and between the fighter and their environment. Essentially, that energy is always in movement and is moving both around and through living beings as well as inanimate objects and surroundings. When a fighter is able to translate this understanding through their fighting, then they have truly become high-level Shinobi. However, for most, it is impossible to actually control this "flow" of energy and that most internal martial arts work to exploit the weaknesses of an opponent's flow. However, through Bāguàzhǎng, Seireitou is capable of completely altering and affecting (possibly even disrupting) the flow of energy in the air around him through the use of his Jūken. By aiming for key tenketsu of the opponent's body, via palm thrusts, Seireitou can alter the course of energy flowing around the opponent and through the opponent, essentially weakening their subsequent counterattacks or chances of continuing the fight. By doing so, the effects that can occur can end up weakening the joints (affecting flexibility) or causing a disruption in their internal and external energy patterns. Many other effects are possible based on how the flow of energy is altered, dealing in various results. He had created a technique known as Eight Trigrams: Seijūken, which is a technique that allows Seireitou to control the entire radius of distance covered by the length of both his arms, by using a pulse of chakra from his centre to feel out the attacks that enter that "sphere of influence".
Through the level of control Seireitou is capable of inducing upon his own body, it is actually possible for him to form an axis down the center of his body, allowing him to freely move the left side of his body and the right side of his body as though he were two individuals. The purpose of this is to be capable of using self-collaboration ninjutsu, as having his body act as two different beings prompts his own chakra flow to follow suit as it molded in two distinct locations rather than one distinct location like others, making it possible for Seireitou to produce two chakra natures at the same time and then combining them together into one technique. These are often referred to as his "Dual Arts" (双法, Sōpō), referencing the act of combining two different elemental natures together into a single ninjutsu. Because the body now operates as two distinct individuals, this is where Seireitou reveals his mastery of the one-handed seals, which is an essential factor in carrying out his dual arts successfully.
Advanced Nature Creation
It is possible for Seireitou to take his self-collaboration ninjutsu a step further by utilizing his knowledge of Ninshū. He connects the two chakra pools of varying natures together through the aforementioned discipline and actually generates forth an advanced chakra nature. This is normally an impossible feat because it is already impossible to draw upon two chakra natures at the same time without it already being biologically programmed into one's genes, and even then, only that specific nature is accessible. However, for Seireitou, who had mastered control over his anatomy and his overall physical being, he manages to generate these natures by molding together two distinct chakra natures simultaneously.
Because Seireitou himself has access to all the basic chakra natures, including that of Yin Release and Yang Release, it is possible to literally produce any advanced nature composing of two distinct elements. He has already shown prominent use with the Ice Release and Swift Release, among many others.
Known as the True Successor of Ninshū (忍宗の真後任, Ninshū no Shinkōnin)...
Great Yin Method
Rabbit Goddess Technique
As Kaguya Ōtsutsuki's sole transmigrant, as well as the sole Hyūga to have transcended the limits of the Byakugan, Seireitou is known as the only wielder of the Rabbit Goddess Technique (卯の女神の術, Usagi no Megami no Jutsu); one of his most powerful and versatile abilities. Using the technique would be indicated by Seireitou's normally straight long hair becoming far more loose and wild, resembling Kaguya's own majestic hair, with his bangs growing all over his forehead and hanging off at the sides, causing parts of his face to sometimes be hidden from sight. While in this form, he is referred to as the "Rabbit God" (ウサギの神, Usagi no Kami), having complete access to Kaguya's massive energy reserves as well as her knowledge and skill set.
While in this state, he is capable of preforming the five abilities that are connected by the Rabbit Goddess Technique, named for the five items of legend that were once associated with the story of Princess Kaguya; specifically, they are the Robe of the Fire Rat, Cowrie Shell of the Swallow, Jewel of the Dragon Head, Adorned Branch of Hōrai, and the Stone Bowl of Buddha. These respectively grant Seireitou unique and powerful abilities, such as ignorance and resistance of the elemental chakra natures, reading the mind and emotions of a specific target, the power to conjure forth storms and rule over nature itself, usage of the Truth-Seeking Ball and other forms of the Yin-Yang Release, and the power to absorb chakra whether from a technique or from the source directly. It is only because Seireitou's Byakugan is capable of perceiving all things in the universe as energy that he is able to use these abilities to such a degree that he is considered to be just as fearsome as the Rabbit Goddess Kaguya was once revered to be.
Great Yang Method
Regarded as the highest level of Senjutsu, Seireitou serves as the only known user of the aptly named Great Yang Method. Sage techniques are different from standard ninjutsu and genjutsu because they utilize a chakra crafted from spiritual and physical energy mixed together with natural energy. The latter form of energy is drawn from nature itself, as the name implies, which composes the environment that surrounds the Sage. However, despite the vast power that exists on this spectrum, this natural energy is but a significantly minuscule fragment of where natural energy finds its origins. All life on the planet begins with the Sun, which means that the Sun itself is the single most abundant source of natural energy available and where all life on the Earth finds its own natural energy; as the plants draw their food source from the Sun, while living beings such as humans and animals later obtain their food source from those very plants; whether by direct or indirect means. In a way, one can relate the Sun to natural energy as the Shinju is the originator to all chakra. When one masters Senjutsu to its highest level, as Seireitou has explained, one becomes capable of drawing upon the true source of all natural energy: the Sun itself. By being able to draw upon this immense source of natural energy, one's Senjutsu completely transcends its prior limitations and becomes something new entirely. However, the most amazing attribute of the Great Yang Method is that by learning to harness the Sun's power, one can accomplish several feats that involve utilizing its heat: such as pulling on a solar flare and causing the entire landscape to erupt into wild flames.
Rabbit Goddess Sage Technique
Being the reason why Seireitou was granted the title, "God of Taijutsu" (体術の神, Taijutsu no Kami), Seireitou is capable of awakening all eight inner gates, entering the released formation state which allows its user to acquire powers hundreds of times greater than their normal selves. However, for most individuals, this leads to instant death due to the devastation and stress wrought upon their human bodies. Seireitou had developed a specialized transformation which allows him to enter this transformation without succumbing to its drawbacks. He summons forth Hakemaru, his most trusted of all animal summonings, whom takes on his true fox form and wraps around Seireitou's shoulder, which through Ninshū, connects the two together on the spiritual level and thus maintain the enormous expenditure of chakra from all eight of the inner gates having been opened while also allowing Seireitou's body temperature to be safety managed so as to avoid his body evaporating by the immense heat that comes with the form. However, it is not only through this action, but through combining his senjutsu that enables him to enter this state with such composure that he almost appears "natural", as many opponents have noted, as the natural energy gathered by Hakemaru is the foundation of his role of management throughout the transformation. In this form, his sage transformation combined with his connection with Hakemaru causes Seireitou to be adorned with a majestic black robe as Hakemaru's nine tails make their way around his body and can actually be used as extensions of Seireitou's own body. In addition, his hair also becomes a strange mixture of the natural white with a lower layer of black, symbolizing "yin" and "yang" chakras maintaining balance between himself and Hakemaru; the basis behind using the Eight Gates Released Formation without falling to its normally dangerous aftermath.
It is truly the pinnacle of Seireitou's power as a shinobi, as his strength and speed have reached levels that would surpass even the bijū. He is capable of preforming the Evening Elephant with such ease, through both his limbs and through weapons, that a single swing of his sword was enough to completely demolish a mountain range. Even the Susanoo technique cannot withstand being struck by Seireitou in this form, as only Ryun Uchiha has shown the power necessary to hold back Seireitou in this form with his personal Susanoo; even then, only temporarily without additional support from his other abilities. The force of Seireitou's chakra is so terrifyingly immense while in this transformation that it crushes fragile constructs around him simply by standing near them. When engaged in battle, his speed is enough to generate great levels of heat, enough to actually temporarily be engulfed in flames while attacking his targets.
Seireitou has immense skills in chemical engineering and genetic engineering, among other scientific technique. This skill was most definitively shown when he was able to reverse-engineer organisms from mere DNA samples, recreating exact replicas of the tailed beasts, although it had taken nearly three decades to complete the project.
- "Back then, Ryun and I discussed something. I had asked him to define what happiness would look like if he could give it a physical form. If I'm not mistaken, Ryun answered that the shape of happiness might resemble glass. His reasoning made sense. He said that even though you don't usually notice it, its still definitely there. You merely have to change your point of view slightly, and then that glass will sparkle when it reflects the light. I doubt that anything else could argue its own existence more eloquently."
- (Speaking to Academy Students about the five nations) "Fire is the element of power. The people of the Land of Fire have desire and will, and the energy and drive to achieve what they want. We strive to uphold the "Will of Fire", which provides us with hope and inner strength. Earth is the element of substance. The Land of Earth and their people are diverse and strong. They are persistent and enduring. Subsequently, they put their faith in the "Will of Stone". Air is the element of freedom. The Land of Wind, in their deserts which allow for isolation from the strife of the other nations, have found peace and freedom. Lightning, an absolute force, is an element that represents authority. The people of the Land of Lightning are resolute and, like those of the Earth, will stand before any consequence with pride. Water is the element of change. The people of the Land of Water are capable of adapting to many things. They have a deep sense of community and love that holds them together through anything, which has allowed them to persevere through the dark chapters of their history. It is important to draw wisdom from many different places. If we take it from only one place, it becomes rigid and stale. Understanding others — the other nations — will help you become whole."
- " By my actions and my own will, I have ascended beyond what history had originally designated as the best; breaking through the plateau of limitation."
- (To Ryun Uchiha) "Within all beings, from their foremost personae to the deepest plateaus of the unconscious, lies the insatiable desire for conflict. Hagoromo Ōtsutsuki's ideal was cute — a land of peace where all people are connected by understanding rather than warfare. But one can not ignore their base instincts. Humans will always be drawn to conflict. So, in actuality, you're not fighting me... so much as you are the human condition." (すべての生き物の中では、彼らの一番のペルソナからの無意識の最も深い高原に、紛争のための飽くなき欲求はある。大筒木ハゴロモの理想のは良かった - すべての人は、理解ではなく、戦争で接続されている平和の地。しかし、人はその基本的な本能を無視することはできません。人間は常に競合に描画されます。だから、実際には、あなたがそんなにあなたが人間の状態であるように...私を戦っていない。, Subete no ikimono no nakade wa, karera no ichiban no perusona kara no muishiki no mottomo fukai kōgen ni, funsō no tame no akunaki yokkyū wa aru. Ōtsutsuki Hagoromo no risō no wa yokatta — subete no hito wa, rikaide wa naku, sensō de setsuzoku sa rete iru heiwa no ji. Shikashi, hito wa sono kihon-tekina hon'nō o mushi suru koto wa dekimasen. Ningen wa tsuneni kyōgō ni byōga sa remasu. Dakara, jissai ni wa, anata ga son'nani anata ga ningen no jōtaidearu yō ni... Watashi o tatakatte inai.)
- "A tiger should always be wary of how a dragon dances." (虎はいつもどのように龍の踊りを警戒する必要があります。, Tora wa itsumo dono yō ni ryū no odori o keikai suru hitsuyō ga arimasu.)
- "This is the fate to all those that assume the identity of the ancients. Whether it be Princess Kaguya, the great Sage Hagoromo, and so on... None of you possess what is necessary to utilize such power. This is a power that rightfully belongs to Seireitou Hyūga and Ryun Uchiha... and none others. Fools like you deserve to be damned." (これは古代人の身元を引き受けることすべての人に運命である。 というようにかぐや姫、偉大な仙人羽衣、となるかどうか··· あなたはどれも、そのような力を利用する必要があるものを有していない。 これは当然日向精霊塔とうちはリュンに属し力です... となし職業。 あなたのような愚か者はのろわれるに値する。, Kore wa kodaibito no mimoto o hikiukeru koto subete no hito ni unmeidearu. To iu yō ni Kaguya-hime, idaina Sennin Hagoromo, to naru ka dō ka... Anata wa dore mo, sono yōna chikara o riyō suruhitsuyōgāru mono o yūshite inai. Kore wa tōzen Hyūga Seireitou to Uchiha Ryun ni zokushi-ryokudesu... to nashi shokugyō. Anata no yōna orokamono wa norowa reru niataisuru.)
- "What I wish for is a burning era in which people seethe with ambition. Show me your strong soul!"
- "Little cicada that dared to venture beyond its tree branch, let me show you just how big the world really is!"
- "If you wish to use Sharingan techniques or any other form of dōjutsu against me, then you had best have eyes that surpass those of Ryun Uchiha. Otherwise... Stop wasting my time."
- Seireitou's title, "Devil King of the Sixth Heaven", is derived from the king of demons who dwells in the highest heaven of the world of desire in Buddhism. He is a being who makes free use of the fruits of others' efforts for his own pleasure. Served by innumerable minions, a parallel drawn with Seireitou's vast underground criminal network, he obstructs Buddhist practice and delights in sapping the life force of other beings. Scheming to prevent the people of this world from going to the pure lands elsewhere, the Devil King seizes every opportunity to carry out his perverse acts. It is also the same title by which Oda Nobunaga, one of Japan's three great unifiers, addressed himself as in a letter sent to Takeda Shingen.
- As decided upon by the author, Seireitou's seiyū would be Toshiyuki Morikawa, the Japanese voice actor for Naraku from the anime series, Inuyasha. His english voice actor would be Michael Dobson, who also played the voice for the Shikon no Tama in the same aforementioned series.