Seitori Yomiya

Seitori Yomiya is a supporting character in the Jujutsu Kaisen series. He is a third year student at Kyoto Jujutsu High and the current heir of the Yomiya family.

## Appearance

Seitori is a young man with red eyes and matching red hair. He has a slim like build and long tied hair. Despite his appearance, he is very muscular, although he prefers not to regularly show this.

He is considered a bit unorthodox in his style as he mainly choses to wear clothing like kimono, haori and yukata that are made by his family as a way to keep them close and always remind him of his duties. He notes that he feels somewhat uncomfortable wearing other types of clothes.

His clothes often have feather or phoenix like patterns because of his reputation as the Vermillion Bird, he also wears feather earrings. These clothes are custom made and are of very high quality.

## Personality

Seitori is a rather stoic and calm man. He is gentle and kind hearted and cares a lot for his comrades, with him wishing for their good health and fortune. He enjoys spending time with others although he states that he unfortunately does not have much time to do so.

He seems to be in touch and at peace with his own emotions as he is able to keep his composure even during times of crisis and high pressure, being able to use those emotions to direct his focus onto his objectives.

He is described as a free spirit, who travels according to his own will, helping others he finds along his journey. He states that although he was born to be a sorcerer thanks to his techniques, he willingly goes through his training because of his desire to make the world a safer place. He is constantly traveling to resolve problematic issues around the world, but his family limits his travels, leading to him centering mostly around Japan, this saddens him as he desires to travel around the whole world to defeat cursed spirits and curse users.

Due to being mostly raised by his sorcerer family and not interacting much with others, he is a bit socially awkward as he tends to speak very formally and with an older style of language, sometimes not noticing common social cues or failing to understand some concepts. This makes him feel confused as his classmates tell him this, with him having a desire to understand the world more. This sometimes makes him self-conscious of himself which wounds him deeply and drives him to try to explore and understand more things.

He is most likely to be angered when one of his friends are hurt or wronged, proved when he became enraged after seeing his comrades injured during the Shibuya Incident Arc and responding back in full force, with him believing in the sense that if someone were to hurt a member of his group, he should respond back in a reciprocal way. This can even extend to people he does not know very well, as he is angered when seeing innocents being harmed and sorcerers he does not know.

## History

Seitori was born to the Yomiya family, a family known as the guardians of the underworld who guide lost spirits to their paths. As he was born with his family's inherited technique, he was trained since childhood to be a jujutsu sorcerer, having experimented with various weapons before finally finding one that suited him, the sword.

At some point in time, he developed his inherited technique even further and managed to find a way to change his cursed energy into positive energy, which makes him even deadlier when fighting against cursed spirits, further cementing his status and combat prowess. His family noted that this was an ability that had though to have been lost centuries ago within the Yomiya family and that it was a miracle that he had been born with it, as it could now be restored in their bloodline.

This achievement prompted his family to give him one of the family's treasures, a special grade cursed tool that could strengthen the users cursed energy, which he accepted with honor, although doubtful as he did not wish to marry a woman he did not love for the sole purpose of bearing a child that could continue a bloodline despite the family already having accepted those without cursed techniques.

He eventually enrolled into Kyoto Jujutsu High, where he is a dedicated student who is constantly working hard to improve himself. He is not often present as he started traveling to missions as soon as he was strong enough to complete them by himself as he does not want to risk the life of anyone but his own, although he occasionally comes back to check on his classmates and acquaintances, showing great joy in watching his friends improve.

Having shown promise and strength, he was later appointed to be the heir despite his wishes against it as he does not believe that he is capable of leading the family and would rather continue to fight against curse users and cursed spirits. This insecurity of his is eventually resolved after learning of Megumi Fushiguro's desire to become the head of the Zenin family so he could change the current values to make the sorcerer world a better place, deciding to help him and become the head of his own family in order to support him and have influence.

## Abilities

**Overall Abilities:** As a semi-special grade sorcerer, he is an extremely strong sorcerer, proving strong enough to take on assignments given to him by Satoru Gojo, as well as earning his reputation as one of the most respected students in Kyoto. He is strong enough to fight on equal ground against other semi-special grade levels threats such as Uraume and even pose a threat to the special grade Psuedo-Geto.

He has been praised by both Megumi Fushiguro and Azayahi Shinsei for his incredible strength. The Yomiya family also claims that Seitori is the strongest sorcerer that has ever been born to that family, further cementing his status as there have been multiple strong grade 1 sorcerers born from that family in the past.

He was able to fight on equal ground with Uraume while defending the weakened sorcerers and then overpower the semi-special grade curse user. This made Pseudo-Geto note his strength and consider the fact that it was very possible that he would be able to kill Dagon, Choso and Hanami even if he fought all three cursed spirits at once, a further testament to his immense strength. Pseudo-Geto even considered him to be the biggest threat during his fight against the jujutsu sorcerers during the Shibuya Incident Arc, (although it is important to note that the jujutsu sorcerers with the power to rival him were all worn out from their fights against the cursed spirits).

**Immense Strength:** Seitori possesses an immense amount of physical strength, which was demonstrated when he could slash through entire buildings, as well as Uraume's ice with a single stroke of his blade without using any cursed techniques. The shockwaves created from his sword swings are strong enough to smash through buildings. He was also able to brutalize Uraume and he is able to destroy most cursed spirits he encounters with a single stroke of his blade. He could also parry and counter Pseudo-Geto's attacks.

**Immense Speed and Reflexes:** Seitori possesses an immense amount of speed, as shown when he was able to blitz Uraume without the sorcerer being able to defend themselves, as well as save every sorcerer they had trapped in their ice beforehand. He was also able to react to and counter every single one of Uraume's attacks, he was also able to react to Pseudo-Geto's attacks and retaliate back at him, although he was eventually overwhelmed by the curse users immense power.

**Immense Stamina and Durability:** Seitori possesses an impressive amount of durability, as well as an incredibly high amount of stamina. By his own admission, he is not particularly good at taking direct hits when compared to other sorcerers, but he is still durable enough to take multiple hits from Pseudo-Geto, only receiving moderate injuries that did not impair his movements and that did not need any treatment. He was also noted to not be tired after the fight had ended, as he could still continue fighting as if he had sustained no wounds.

**Keen Intellect:** Seitori possesses a high amount of intellect, this is credited due to both his natural problem solving skills, his upbringing and his constant studies. He is able to keep a calm and level-headed mindset at all times, even during combat and is constantly analyzing his opponents fighting patterns to find weaknesses, while using his inherited techniques to disrupt and confuse opponents.

**Master Swordsmanship:** Seitori possesses an incredible display of sword wielding abilities, as he has been honing it his entire life and practices daily to maintain it. He is skilled enough to outmatch other sword users, as well as use it in conjunction with both his positive and cursed energy. He is also able to create high pressure blades of wind and direct them onto targets with extreme precision. Despite most of his attacks focusing on quickly sheathing and unsheathing the blade in order to use burst attacks combined with cursed or positive energy, he is very skilled at continuous swordplay and can overwhelm opponents using skill alone. Seitori is able to cut through most objects, including metal, and even fire and electricity.

**Expert Hand-to-Hand Combatant:** Despite not being his main form of combat nor his area of expertise, Seitori has been shown to be quite proficient in unarmed combat, being able to take on strong opponents without using his sword, although he admits that he could not beat a very skilled opponent if they could match his speed and strength. Seitori mainly utilizes palm strikes, palm chops, throws and kicks rather than punches as he does not feel like that style is suited for him, opting to fight in a defensive way that can intercept the opponents moves should they make a mistake. Seitori attributes learning this to not be useless should he ever not have his sword in his possession or if an opponent manages to disarm him during a fight.

## Jujutsu

### Cursed Energy Manipulation

Immense Cursed Energy: Due to the nature of his inherited technique, Seitori's cursed energy feels slightly different when compared to that of other sorcerers. Seitori possesses an immense amount of cursed energy, as well as a deep understanding on how to use it. He has enough energy to instantly swap between his techniques, as well as using them in conjunction in a display of honed skill. He was shown to be able to constantly use his abilities against a semi-special grade curse user without showing any signs of fatigue, he did not have to recover after the fight was over and mainly focused on helping the injured.

**Positive Cursed Energy**: Thanks to his inherited technique, Seitori is able to directly positive cursed energy, this makes him extremely dangerous and suited to fight cursed spirits as they are incredibly weak to it. He is able to proficiently exorcise even semi-special grade cursed spirits easily even if they are stronger than him due to their weakness to this type of energy.

Reverse Cursed Energy: While Seitori is not currently able to perform the reverse curse technique, it is heavily implied that users of his inherited technique have an easier time learning how to do so.

Black Flash: A technique that creates spatial distortion when a user connects with an impact of cursed energy within 0.000001 seconds of a physical hit. The phenomenon causes cursed power to flash black, creating a more potent attack to the power of 2.5 of a normal hit. It is unknown when Seitori performed this attack for the first time, but he claims to have only done so once.

### Inherited Technique

**High Plain of Heaven, Realm of the Dead** (高天原 黄泉の国 Takama-ga-hara, Yomi-no-Kuni): Seitori's inherited technique, usually shortened to Heaven & Underworld (天国と冥界Tengoku to Meikai) is the inherited technique that is unique to the Yomiya family. This is a combination of both the families Underworld technique and the thought to have been long lost Heaven technique that combined into one inside of Seitori, due to this, his family believes that he has an extremely high potential as a sorcerer. This technique allows the user to access both the powers of "heaven" and of the "underworld", these are only metaphorical representations of how the users apply and channel their energy as these locations have not been confirmed to exist yet.

**High Plain of Heaven**: Using Heaven, the user can access the High Plain of Heaven which allows the user to directly produce positive energy which is extremely effective against cursed spirits due to their bodies being comprised entirely out of cursed energy. An important point to make is that this technique does not allow the user to produce reverse cursed energy as despite the two being similar and linked together, the technique does not provide this, although it is noted that users of this technique have an easier time learning how to produce it.

**Spirit Art Plummet**: Seitori charges his blade with positive energy and unleashes his blade in a downwards motion which causes a large wave of positive energy to discharge in the direction that he struck his blade, it is mainly used as a defensive maneuver but can be used offensively. Seitori first used this attack to completely shatter Uraume's ice during the Shibuya Incident Arc.

**Realm of the Dead**: Using Underworld, the user can access the Realm of the Dead, which allows the user to produce a stronger variation of cursed energy that glows black, similar to Black Flash, this black cursed energy is considered even more haunted and negative than regular cursed energy, as well as it being stronger and more destructive, at the cost of being harder to control. It is noted by Seitori that if an untrained person were to use this technique, they would either destroy their own bodies from the backlash of using it or the energy would take control of them and make them go on a mindless rampage.

**Black Abyssal Vortex Slash**: Seitori first firmly stomps on the ground, bending his knee so that he can later gain momentum from dashing at his opponent. He then creates a vortex of black cursed energy around his body, then he dashes at his opponent while unsheathing his blade charged with either positive or cursed energy, while channeling his black cursed energy in a way that when he passes through them, the vortex also violently slashes the opponent. He first used it during the Shibuya Incident Arc where it was powerful enough to brutalize Uraume, a powerful semi-special grade curse user.

## Battles and Events

**Tokyo Goodwill Event Arc**

* Kyoto Sister-School Goodwill Event (2017)
	+ Individual Battles
		- Yuta Okkotsu vs Seitori Yomiya

**Shibuya Incident Arc**

* Seitori Yomiya vs Uraume
* Jujutsu Sorcerers & Choso vs Psuedo-Geto & Uraume

## Trivia

* According to the Jujutsu Kaisen Official Fanbook:
	+ Enrollment method: Family lineage.
	+ Hobbies: Visiting shrines, burning incense, reading, feasting and practicing swordsmanship.
	+ Favorite color: He likes all colors, but prefers red, white, black and gold.
	+ Favorite animal: Various species of birds, but his favorite is the phoenix.
	+ Favorite music: Traditional japanese music
	+ Cause of stress: Cursed spirits and curse users, insecurity in the world, not having enough time.
	+ Type of person: A kindhearted woman which he can grow to love, no matter her quirks.

* He is based on Suzaku from the Fairy Tail: 100 Years Quest series.
* His surname contains the kanji for "underworld" (黄泉 *yomi*) and "slay" (殺 *ya*); his given name contains the kanji for "spirit" (精 *sei*) and "bird" (精鳥 *tori*). His surname can be interpreted as "Underworld Slayer", a reference to his inherited technique, family and the fact that he exorcises spirits, and "Spirit Bird", a reference to his innate technique, his likening to birds and his sense of freedom.
* His alias, "Vermillion Bird" (朱雀 Suzaku) is one of the auspicious beasts, and is also part of his original character.
* He is very bad with directions and often gets lost during his travels. He is also notably bad at using technology, barely managing to know how to use a phone.
* Several people have tried to rob him because they think he has a feminine like appearance but they are quickly dismissed because of his massive physical strength and immense combat experience.