Sanemi is a tall, muscular young man with large sharp eyes. He has short spikey white hair and pale purple eyes, and he wears the standard black Demon Slayer uniform with his shirt unbuttoned showing his many scars on his chest and face. his face and body are covered with scars, accumulated during his many years of fighting against the demons Sanemi is a very aggressive, hot-blooded and stubborn boy who is often pushy and quick to lash out.