Yuuichi Jin

Height: 179 cm (5'10.5")

He is an S-Class agent affiliated with the Border Tamakoma Branch.

He describes himself as a "highly skilled elite" and carries himself with a carefree, breezy attitude. Due to a "side effect," he is able to see the near-future of the person standing before him. Between his "side effect" and his penchant for operating in the shadows, he possesses an elusive, devil-may-care air that makes it difficult to discern his true intentions.

He lost his mentor, Soichi Mogami, as well as many of his comrades, in battles against Neighbors. It has also been revealed—though the timing remains unclear—that his mother was killed by a Neighbor.

Despite this history, he does not share the view held by characters like Miwa—that "all Neighbors are enemies." Instead, he belongs to the Tamakoma branch, a faction within Border that advocates for friendly relations with Neighbors. That said, his personal stance is more neutral compared to other members of the Tamakoma branch.

After graduating from high school, he chose not to pursue further education; he is a highly skilled individual who remains unaffiliated with any squad, operating independently and appearing in unpredictable locations.

He is extremely fond of "Bonchi-age" (a type of fried rice cracker), keeping boxes of them stockpiled in his room and frequently offering them to others. It is said that if you swipe some of his Bonchi-age, he will retaliate by having an entire box delivered to your home.