Jiro Awasaka/Synopsis

History
In the past, Jiro worked as a killer for hire and used his technique in his work. One day, Jiro accepted a contract to kill Satoru Gojo. As Jiro was spying on Gojo on a street bridge, Jiro became frightened when Gojo notices him from afar. The birth of Gojo prevented Jiro from continuing his work as a killer.

At some point of time Jiro met Pseudo-Geto and joined his group.

Shibuya Incident Arc
On October 31, Jiro is on top of Shibuya's S Tower with Ogami and her grandson as they guard the cursed tools that are putting up the curtains. When Yuji Itadori shouts that Gojo has been sealed, Jiro hears this and talks with Ogami about what could happen next. Jiro then wonders if the enemy can find them, but Ogami's grandson says that the enemy won't be able to get to their location fast since the lower floors of the tower is full of mutated humans. When Megumi Fushiguro and Yuji suddenly show up and trap the three with a wire, Jiro manages to slip free and grab two of the objects that are putting up the curtains. Jiro is suddenly wrapped with the wire multiple times and thrown off of the tower.

At ground level, Megumi and Yuji find Jiro but Megumi notices that Jiro is still alive which Jiro gets up and prepares to fight the two. As Jiro fights the two, Megumi and Yuji notice that none of their attacks are working. While continuing the fight, Megumi tells Jiro that Gojo is in Shibuya but Jiro replies that he already knows that Gojo has been sealed.

Jiro then says that its about time that he kill them, which Megumi summons his Rabbit Escape to distract Jiro. As Jiro wonders about the rabbits, they are dispelled which Jiro wonders if the two had escaped. Suddenly Megumi drops his Max Elephant on Jiro, but Jiro easily withstands it. As Megumi deactivates his Shikigami and distances himself, Jiro gets annoyed with Megumi and tells him to fight him like a man. Megumi says that is more of Yuji's thing, as Yuji throws a car at him. Jiro then continues to fight the two, and thinks about how their attacks would not hurt him due to how his technique works.

As Jiro is being pressured by the two, he is attacked by Megumi's toad, and due to his technique, that attack does some damage to him. Jiro is then pummeled by Megumi and Yuji, and Jiro tells them to not get cocky. Jiro notices that Yuji is preparing a powerful attack, which Jiro tries to counter. Jiro notices that Yuji has stopped his fist just before it had hit, and is then defeated when Yuji punches him after adjusting the power of his punch. Jiro is then tied up while he is unconscious. It's unknown what happened to him afterward, though it's likely he was arrested by the Jujutsu.