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