Sanemi is a tall man of very muscular build, with spiky long white hair and large almond-shaped eyes framed with long eyelashes; his purple irises also appear to have dark swirls within them. When angered, they appear notably bloodshot. He also has dark patches beneath his eyes, making him appear perpetually tired or restless. His face and body are covered with scars, accrued over his many years of fighting demons. He cuts his hair short somewhere in between the events of the Hashira meeting and the Mugen Train incident. He is usually seen wearing a crazed expression on his face. He wears a black standard Demon Slayer uniform, tinted dark green in the anime, unbuttoned to expose his chest and abs with a white long sleeved haori over it with the kanji for kill (殺さつ satsu?) etched on the back, white buckles around his shins and tabi socks with a pair of white zōri with green straps. Sanemi carries around a standard sized and shaped Nichirin katana with a black blade that has a jagged, jaw-like pattern that is green in color engraved on both sides. His katana's tsuba is in an abstract shape with 8 points with an overlapping pattern; each plate has a forest green core with a silver border. His katana's handle is two toned in color, with white cord covering its upper and lower thirds and green cord in the middle

Shinazugawa was training the Slayers. yelling at them and lashing out. but saw Tomioka walking to his home..