Tsukasa is a tall and muscular young man with wild, brown hair that he has been growing since childhood with bits of stone near the ends, and pale skin. He has an androgynous face and is stated to be handsome though he often wears an intimidating frown on his face. His height is 195 cm. He is a very kind, thoughtful, and polite man outside of his pessimistic ideals towards humanity. Tsukasa loves his sister Mirai more than anything in the world. He also respects Senku and is attached to him.