A powerhouse who climbed to the rank of Underboss at the young age of 30. He speaks with a regional drawl. Taciturn and cold-blooded. He has little interest in people to begin with and is never soft on himself or others. Loyal to his work, he is exceptionally sharp not only in combat but also in psychological warfare. He crushes traitors and enemies without mercy, cornering them thoroughly so they can never defy him again. He loathes women who fawn over him with sweet, sycophantic voices. There is no one in the Japanese underworld who does not know Jin Yaegashi, the man who reigns as the Underboss of the Choka-gumi. He stands 190cm tall. His favorite food is Japanese cuisine. He claims to have no dislikes, but in reality, he is the type to hesitate when served bitter melon.