Джін Юїчі

Yuuichi Jin is an S-Rank agent and also a member of Tamakoma Branch. He is one of the strongest members in Border. He also has a Black Trigger named Fujin. Jin's Side Effect is Foresight, allowing him to predict future events. His mentor Soichi Mogami lost his life making Jin's Fujin.

With the help of engineers at Border, Jin was able to create a new type of trigger, Scorpion, which was adopted by many Border agents.

Jin is demoted to A-Rank after he offers his Black Trigger in exchange for Yuma's safety and guaranteed enlistment