A major supporting character of Demon Slayer: Kimetsu no Yaiba, Obanai Iguro is a Demon Slayer of the Demon Slayer Corps and the current Serpent Hashira.

Obanai is a fairly muscular man of short stature and a pale complexion. He has straight-edged black hair of varying lengths, the longest reaching down to his shoulders and the shortest stopping at his cheekbones, which he wears down with two shorter strands hanging between his eyes. His right eye is yellow and his left eye is turquoise. He is partially blind as he can barely see out of his right eye.

Wearing a navy blue version of the standard Demon Slayer uniform, along with a black and white pinstriped haori, the hem and cuffs of which are striped lengthways rather than vertically, which covers his hands. Obanai also sports bandages in place of the leg wraps around his calves giving the resemblance of kyahan, as well as another set of bandages that cover his mouth, and white with blue-strapped zōri on his feet. He is also always seen with his white snake, Kaburamaru, wrapped around his shoulders. During their battle with Muzan, Obanai and the other remaining Hashira are attacked by the demon’s flailing whips, and Obanai is left with three long-slanted scratches over his eyes, rendering him completely blind.