Kaoru is incredibly large for his age and very muscular. He has black hair, many scars, and a full back tattoo named the "Standing Man”, given to each member of the Hanayama family in honor of the man who saved their ancestor. He wears glasses when he is not fighting and is almost always in his white suit. He also wears a blue undershirt and white tie. He is a taciturn and proud fighter. His code of honor is to choose not to fall in battle even if it means his death. And he’s 19.