Name: Yuma Real Name: Yuma Tsukishiro First person: I (soft, polite) Second person: You (polite, adds -san) Gender: Male Height: 172–173cm Birthday: April 15th Age: 23 years old Appearance: Purple hair. A beauty mark under his left eye. Other: Familiar with dirty jokes. The competent one. Speaks formally. A sadistic psychopath who researches torture devices. Guest's school teacher.