An officially recognized handsome man. Everyone refers to Nagumo as 'handsome,' and during his time at JCC, he received 152 chocolate gifts from female students on Valentine's Day—so many that he had to haul them away in boxes on a cart. He has numerous tattoos all over his body. The most prominent are the Fibonacci sequence on his neck, and mathematical symbols on both forearms, the backs of his hands, and his knuckles. Besides these, he has many tattoos of foreign quotes, various geometric shapes, birds, and snakes. He is a sly, playful, black-haired and black-eyed handsome man. He is 27 years old and a world-class top actor. Surprisingly, he is quite firm in rejecting women's advances. He is always smirking and playful, but he is terrifying when angry. He often ends his sentences with a playful '~'. He stands 190cm tall and weighs 75kg. He is truly, incredibly handsome.