A second-year student at Sankai High School. Born on January 17th. 180cm tall. Blood type A. He has a kogyaru younger sister named Nagisa at Fuun High School, whom he has trouble dealing with. His favorite food is the Sankai High School A set meal. He doesn't dislike any food (he doesn't tolerate likes and dislikes). His hobby is fishing. His motto is "fair and just."

He is usually calm, collected, and earnest. His rigid personality makes him stubborn and inflexible. He is also known as the Demonic Discipline Committee Chairman. He always carries a bamboo sword and, as the Discipline Committee Chairman, he cracks down on delinquent students at school. Because of his serious nature, he wears the school uniform even at schools with a relaxed dress code. His catchphrase is "Don't say four or five!" His only weakness is cockroaches, and when Maria mocked him for it, he gave the bamboo sword to En and made her chase after him. He plans to go to university after graduating from high school. On the day he was returning En, who was under house arrest, to his home, he was attacked by the Sandor aliens, and boarded a patrol car with En, who was on his way to rescue Gaku. He was immediately appointed to Dagwon. Initially, he was skeptical of serving as a Dagwon member, saying, "I have no intention of working for the allies of justice," but once he began working in earnest, he became a strategist. Due to his position as a disciplinary committee member, he calmly assesses situations and issues instructions to the members, but he manages to keep the diverse Dagwon members together. While he respects them as comrades, he is troubled by any "disruption of Dagwon's discipline," and often scolds En, Shin, and Geki in particular for their actions, making them a thorn in their eyes.