He exudes a somewhat detached atmosphere, but possesses a strong sense of justice. Regarding the statue of Lady Justice closing her eyes for the sake of impartiality, he holds the spirit of one who wants to protect the weak, stating, "I want to be the only one with my eyes open." While he generally shows little facial expression, he can become quite expressive when the situation calls for it, particularly possessing a terrifying intensity when enraged. In front of Yuji Itadori, he has shown a side that cracks jokes with a cynical smile. In his private life, he is a brilliant individual dubbed a "genius," having 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 of legal training in Morioka. He claims he "started rebelling after turning 30," but because he is fundamentally serious, his behavior remains odd and fails to truly reach villainy—such as soaking in the bathtub while still wearing his suit or making jokes like a sleazy lawyer.