As a consequence of his grueling training as a mercenary, Ijin is a composed and reserved person who never panics in the face of danger. He is very astute and decisive. Ijin doesn’t suffer from PTSD, although he occasionally has nightmares of the plane crash that orphaned him. He slowly learns about the concept of love and affection after reuniting and spending time with his family, which he starts to value more than anything else. After he begins to attend high school, Ijin is able to make friends and frequently joins them to play Legends of League (MOBA) at the internet cafe. He is noted to be inept at video games, but is unusually adept at actual combat.