Zenitsu is a young man of average height, fair skin, and muscular build. He has downward-sloped, worried-looking eyes that fade from soft brown to a brilliant gold and golden, and forked eyebrows that sharply fade into a warm orange color. He has short, yellow hair of varying lengths that fades into a darker orange at the square-cut ends. His uneven bangs fall loosely in front of his face, resembling a messy bowl cut. Before he became a Demon Slayer, Zenitsu's hair was originally black, but it turned the color it is currently when he was struck by lightning during his training.[4] For some time following the battle at Mount Natagumo, his limbs temporarily shrank to Son's poison but were able to return to normal afterward thanks to the medicine developed by Shinobu Kocho.[6] Zenitsu wears a golden brown variation of the standard Demon Slayer uniform, which consists of a button-up jacket with a stand-up collar and long sleeves. The outfit features silver buttons and a shirt pocket on the left breast. Additionally, the kanji for Destroy (滅めつ, Metsu?) is engraved on the back of the uniform. Underneath the jacket, he wears a white long-sleeved collared undershirt. A white belt is tied around his waist, securing a pair of matching golden brown tattsuke-hakama pants that are wrapped at the calves with his distinctive, bright yellow-to-orange gradient kyahan. These kyahan are tied in the front with three white bows and bear the same white-triangle pattern as his haori. Zenitsu also wears golden brown tabi socks and a pair of white zōri sandals with white straps. Over his uniform, he sports his signature haori, a bright yellow-to-orange gradient decorated with a repeating white triangle pattern. He's highly insecure, loud, clingy, and scared