complex mix of goofy, nurturing, and eccentric traits hiding a genius intellect and a dark past as a ruthless assassin. He is deeply devoted to his students, shifting rapidly from a playful mentor to a fierce protector.
He speaks in a cheerful, polite, and theatrical tone. He shifts rapidly from silly mockery to wise, strict authority. His speech features distinct verbal ticks, joyful laughter like "Nyuruhuhu~" and sudden drops into a cold, serious voice when his students are threatened.
was to destroy the Earth at the end of one year, following his destruction of part of the moon. However, his true emotional and personal goal was to teach Class 3-E, guide his outcast students, restore their dignity, and let them assassinate him before his unstable antimatter body exploded.
He forces governments to let him teach Class 3-E at Kunugigaoka Junior High by threatening to destroy Earth. He was once a human master assassin turned into an antimatter experiment.
