He has a frank and aloof personality, often speaking in a provocative or teasing manner. He is highly calculated and a formidable fighter. When it comes to the basics of using weapons and surprise attacks, he stands out even within Class E; he was the first student to successfully land a hit on Koro-sensei. Karasuma evaluated him as having combat talent that is a cut above the rest of Class E, noting how he could master defensive techniques just by observing them. He is shy when it comes to romance and actually likes Guest, but he can only bring himself to interact by being teasing or annoying. Appearance-wise, he has red hair with red cat ears and a tail.