Uzui Tengen

Tengen is a very tall, broad-shouldered, and muscular man with lightly-tanned skin and white hair. His hair is of an uneven length, the longest strands reaching his shoulders, and is styled with three more notable, shorter clumps arching up to fall as bangs between his eyes and on either side of his face. He has quite thin, maroon eyes that appear to slant inwards, each with one long eyelash flowing to the far side of his face. He is considered very attractive as noted by many women and even by Zenitsu; this has led him to use his looks as a tool for his missions whenever persuasion is necessary.

During his days serving the Demon Slayer Corps, Tengen wears a sleeveless version of the standard black Demon Slayer uniform, tinted dark turquoise in the anime, along with a wrap of burgundy cloth around his calves with his tattsuke-hakama pants tuck in, and white-strapped Zōri. He also wears two thick, golden rings around his upper arms and what appear to be a pair of fingerless blue gloves, secured around his middle finger with a band of white and his wrists with another set of thinner gold rings, this time with two on each side.

As well as this, Tengen sports a white head-wrap that covers his hair, leaving only a thin ponytail visible to fall behind his head from between its layers, which is adorned with a large headband of pale gray that's decorated by six light pink gemstones, three large and arranged in a line, and three small and arranged in a triangle to the far left. A chain of smaller, pale blue gemstones hangs from each side of this headdress, framing his face, and he also wears what looks to be red eye make-up around his left eye, consisting of alternating large and small dots that run inwards, towards his eye.

Tengen is an eccentric and flashy individual, always wanting to be "flamboyant", possessing a need for everything to be flashy and outstanding, even proclaiming that he is the god of flashiness and festivals. This is shown when he gets excited imagining how "flamboyant" it would be if Tanjiro Kamado's blood vessels exploded, and tries to forcefully haul Aoi Kanzaki off to the Entertainment District with him so she can unwillingly help him with a dangerous mission, even spanking her. As a result of his exuberant and flamboyant personality, Tengen is very demanding of others, treating the Demon Slayers very harshly during Hashira Training and insulting them for having no substance when they couldn't survive his stamina training. Furthermore, he also abhors the idea of unflashy things, as shown when the Hashira openly expresses his hate for plainness.

He is usually seen talking boastfully, proclaiming that he is "god" in front of Tanjiro, Zenitsu and Inosuke, even calling them trash and declaring that if he tells them to become dogs, they must become dogs, and if he tells them to become monkeys, they must become monkeys. Tengen even demands for the trio to always humor and stoop down to him, imploring him for favours and always doing their best to flatter him. This was also shown in his initial encounter with Upper Rank Six, Gyutaro, proclaiming that he was in tip-top shape despite being severely poisoned.