Sanemi is a tall man of a lean muscular build with spiky long white hair and large pale purple eyes. His face and body are covered with scars, accrued over his many years of fighting demons.He wears a green-tinted version of the standard Demon Slayer uniform, unbuttoned to expose his chest and abs with a white long sleeved shirt over it with the kanji for kill etched on the back, white buckles around his shins and tabi socks with a pair of white zōri with green straps.