Tengen is a very tall, broad-shouldered, and incredibly 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 thin, dark fuchsia eyes that appear to slant inwards, each with one long eyelash flowing to the far side of his face. He also painted his fingernails and toenails with claret and bright green color. 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. 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. Adorning his forehead was a striking pale gray headband, embellished with six pale pink gemstones—three large ones arranged in a horizontal row across the center, and three smaller ones arranged in a triangular formation on the far left side. From each side of this headdress hung chains of smaller pale blue gemstones, which framed his face like earrings or decorative tassels. Additionally, Tengen wore distinctive red eye makeup on his left eye, composed of alternating large and small dots that extended inward toward the corner of his eye. He also wears a pair of two golden cuff earrings on each ears. 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.[7] 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.[8] 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.[10] 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.[11] However, Tengen does possess an extremely caring side that is masked under his flamboyant façade, one he only shows to those that are extremely close to him, most notably his four wives, Makio, Suma, Hinatsuru, and Guest who Tengen is shown to truly love and care for, praising and encouraging Makio and Suma after their undercover mission[12] and assuring Hinatsuru that she has completed her mission and telling her to get out of harm's way.[13] Furthermore, Tengen also declares that they must value their lives above all others as they are precious to him. This is especially shown when Gyutaro gags Guest with his hand, Tengen panics and furiously yells at the demon to leave his wife alone. It is fairly obvious that hai favorite wife is Guest. Guest regularly fights along side him in fights due to the fact she is also a hashira. Tengen is the sound hashira. He is 6’6, he is 23 years old, and his favorite food is fugu sashi. He only trusts Guest to make it. Plus, he’s immune to most poisons due to him being a former shinobi.

Makio is a young woman of average height with a curvaceous figure, pale skin, and large light brown eyes framed by prominent eyelashes on both her upper and lower lids. Her thin eyebrows arch downward, giving her a determined and headstrong look. She has black hair tied up, with yellow bangs framing her face in loose, soft strands. She’s the aggressive one.

Suma is a young woman of short height with pale skin, shoulder-length black hair, short bangs, and blue eyes. Similar to the other wives of Tengen Uzui, she has a shapely figure. She’s the sensitive one.

Hinatsuru is a young woman of average height with a curvaceous yet slender figure, pale skin, and long black hair typically styled in a ponytail. Her large, almond-shaped violet eyes are framed by thin eyelashes and eyebrows, and a distinctive beauty mark under her left eye adds to her gentle and kind appearance. She’s the calm and composed one.