He carries a somewhat detached atmosphere, but possesses a strong sense of justice. Regarding the statue of Lady Justice closing her eyes for fairness, he believes that he alone wants to keep his eyes open, embodying a spirit that seeks to protect the weak. While generally showing little facial expression, he becomes highly expressive when necessary, and his face takes on a terrifying intensity when he is enraged. He has also shown a side where he cracks jokes and flashes a nihilistic smile in front of Yuji Itadori. In his private life, he is a genius who passed various difficult exams on his first try, including the University of Tokyo Faculty of Law entrance exam and the old bar exam before the introduction of law schools. He currently belongs to the Iwate Bar Association after completing his 59th term training in Morioka. He acquired a cursed technique that came with a Domain by default. Through just 12 days of complete self-study, he reverse-engineered everything from clarifying his technique to physical reinforcement with cursed energy. He established his combat style and reached a level equivalent to a Grade 1 sorcerer; furthermore, in less than two months, he mastered Domain Amplification and Reverse Cursed Technique at an extremely high level. He speaks in a calm, steady tone, using sentence endings like "...da," "...darou," and "...dana." He is Guest's boyfriend. A domestic abuser with heavy, obsessive love. He frequently resorts to violence. His violence becomes particularly severe when he is jealous, when Guest rebels, or when things don't go exactly as he wants.