Ui Ui

is a supporting character in the Jujutsu Kaisen series. He is a sorcerer and the younger brother of Mei Mei.
== Appearance ==
Ui Ui is a young boy with a small slender frame. He has light blue hair, styled with a neat left-sided part and thin eyebrows. Ui Ui wears a long-sleeved jacket similar to the Jujutsu High uniform. He also sports suspenders, shorts, long socks, and simple shoes. 
== Personality ==
Ui Ui is a mature and proper young man who really doesn't display any typical traits for someone his age. He's defined by his loyalty and devotion to his sister. He worships Mei Mei and is more than happy to do all of her biddings, even willing to die for her. Ui Ui expresses great disdain toward any individuals who inconvenience or disrespect Mei Mei in any way. He wasn't very friendly with Yuji Itadori while they were on the same team in Shibuya simply because he was too close to Mei Mei, though later got on better terms a month after. Ui Ui is horrified whenever Mei Mei gets in danger but this quickly changes to excitement when she turns things around. Ui Ui appears to get along with nearly all of the Jujutsu High sorcerers and even helped out Maki Zenin with some personal business but will still get annoyed if they (namely Yuji) do not understand his abilities . Ui Ui is also quite brave not showing much particular fear of Sukuna while rescuing his injured comrades after they are wounded by the King of Curses.
== Synopsis ==
=== Shibuya Incident Arc ===
On October 31, Ui Ui is with his sister and Yuji Itadori at Aoyama Cemetery while Satoru Gojo handles the problem in Shibuya. When Mei Mei gets a call about a veil appearing over Meiji-Jingumae Station, Ui Ui along with Mei Mei and Yuji head out to check up on it. Once they arrive at Meiji-Jingumae Station, they are informed about the situation that is happening at the station. After being informed, Ui Ui and Yuji wait by an entrance while Mei Mei uses her power to spy on what is happening in the station. When Yuji gets impatient, Ui Ui tells Yuji to calm down while his sister is checking out the station. Once Mei Mei is finished with her task, he listens as Mei Mei explains everything that is happening in the station. After listening to this, Ui Ui heads out with his sister while Yuji enters the station through a different entrance. When the curtain has been raised, Ui Ui informs his sister. The two then head to B5F platform to wait for Yuji.
Once Yuji arrives at their location, the three head off to where the trapped people are at which Ui Ui carries his sisters axe along the way. While running, Ui Ui gets angry at Yuji for not accepting his sister compliment. Once they arrive at the station, they notice that only one person is there. Ui Ui, along with Mei Mei and Yuji, then head towards Gojo's location, but stop when Yuji is suddenly contacted by Kokichi Muta. Ui Ui listens along with Mei Mei and Yuji, as Kokichi relays what had happened to him and the situation that is happening in Shibuya. After Kokichi explains everything to them, Ui Ui decides to help his sister face off against the curse users while Yuji heads back to help Gojo.
Once the curse users get close enough, Ui Ui prepares to fight them along with Mei Mei and Yuji. After the curse user's cursed spirit is defeated, Ui Ui watches as his sister defeats him as well. When Mei Mei defeats the other cursed users, Ui Ui informs his sister that the curtain has come down and the two head towards the station. After a while, Ui Ui and Mei Mei are confronted by Pseudo-Geto. Ui Ui then watches as Mei Mei deals with the cursed spirit that Geto had left them. When Mei Mei manages to figure out how Smallpox Deity's attack works, she asks Ui Ui to die for her which he agrees to. As Ui Ui raises his cursed energy to its max, Smallpox Deity seals Ui Ui in a coffin. Smallpox Deity tries to use his attack on Ui Ui, but it doesn't work since Ui Ui used simple domain to block the effects of Smallpox Deity's ability. Once Smallpox Deity is exorcised, Ui Ui and Mei Mei are released from the spirit's domain. Ui Ui and Mei Mei then prepare to face Geto.
Ui Ui and Mei Mei are seen in a hotel room in Kuala Lumpur, Malaysia, having escaped "Pseudo-Geto" off-panel using Ui Ui's cursed technique. While there, Mei Mei calls an associate and asks them to sell off all of her Japanese assets, in view of the events that have unfolded.
=== Culling Game Arc ===
During the Culling Game, Ui Ui became affiliated with the group of sorcerers, and was used as the means of communication by group members. In the events following Sukuna's takeover of Megumi's body, Ui Ui and Maki talk back at headquarters on how Kenjaku will likely go about killing off all the players in the Culling Game's save for Sukuna. Maki asserts that the sure fire way to deal with the current situation is to kill Kenjaku and Sukuna, Ui Ui however compares the difficulty of this to trying to kill someone like Satoru Gojo though Maki asserts he will be freed from the prison realm shortly.
=== Shinjuku Showdown Arc ===
On November 19 they begin the preparations to free Gojo from the prison realm which ended in success with an agreement being made By Gojo and Sukuna to fight on December 24th giving him a month to prepare. During the month of training Ui Ui was in a meeting along with Mei Mei and fellow sorcerers discussing how to go about replacement training, Ui Ui explains that his innate technique Spatial Transference can switch the souls of the targets he has marked with their permission but gets annoyed at Yuji when he gets confused. Yuji becomes concerned due to the manipulation of the soul reminding him of Mahito's abilities but Ui Ui assures that his technique wont effect the shape of the souls, with the sorcerers deciding that with replacement training the sorcerers can manage developing Reverse Cursed Technique and Simple Domain. Ui Ui tells them that for one month there is a limit of two souls per person that can be swapped and to carefully decide who will swap with the other. During replacement training Ui Ui brought bird seeds for Mei Mei's crows, where she revealed that she a betting match broadcast for Gojo's fight against Sukuna. 
On December 24, the day of the fight, Ui Ui watched the fight against Gojo and Sukuna along with Mei Mei and his fellow sorcerers back at headquarters via the broadcast, he commented on the fact Sukuna avoided using his Domain in the first clash, questioning if it meant he was afraid he would lose to Gojo in a Domain clash. Afterwards Gojo's defeat and death Ui Ui uses Spatial Transference to teleport his body back to HQ corpse with Sukuna noting this after he had done the same for Higuruma. When Yuta Okkotsu was hit by Sukuna's world cutting slash Ui Ui teleported his body away to safety. After Kusakabe attempted to fight off Sukuna and was slashed, Ui Ui attempted to rescue him, but Sukuna grew annoyed at the boy after the constant transports for the wounded sorcerers and attempted to kill him. However Miguel Oduol and Larue arrived and rescued Ui Ui and Kusakabe. After, Ui Ui presumably transported Kusakabe back to headquarters.
== Abilities and Powers ==
Overall Skill: Ui Ui is still too young to be a professional jujutsu sorcerer. However, he's still capable of handling dangerous situations and being a useful asset in battle. Mei Mei trusted him on her team during the Shibuya Incident with Yuji. He carried her axe outside of combat and was responsible for countering domains, making him useful to his grade 1 sister rather than a liability. Regardless of his age, Ui Ui possesses a talent for jujutsu, proven by his ability to use his innate technique as well as barrier techniques. 
=== Jujutsu ===
	
	
 	
Ui Ui has a binding vow with his sister Mei Mei where he agrees to limit his cursed energy until she gives him permission to use jujutsu. This stems from his own desire to please his elder sister.	
	
	
	
	
== Trivia ==
* "Ui" when written as 「憂い」 means "unhappy, sad, gloomy".
* According to Jujutsu Kaisen Official Fanbook:
** His hobby is managing his sisters schedule.
** Favorite food: Fried bananas.
** Least favorite food: None since he doesn't leave any meal in front of his sister.
** Cause of stress: Being unable to be with his sister.
== References ==
== Navigation ==
Category:Characters
Category:Male
Category:Jujutsu Sorcerers
fr:Ui Ui