Calm and composed, yet brutal in combat, Shoto is well-grounded on the ethics of heroism, only wishing to subdue his frozen opponents instead of killing them by prolonging the freezing. His hair is evenly split between white on his right side and crimson red on his left, this unusual coloring being due to his Quirk. As another result, he also possesses heterochromia iridum, which causes his left eye's iris to appear turquoise, while his right is a brownish dark gray.