The Man With Too Many Wives-The Sound Hashira Tengen Uzui
Tengen Uzui plays a significant supporting role in Demon Slayer’s Entertainment District Arc. He served as the former Sound Hashira and was a former member of the Demon Slayer Corps.
Hair Color: White
Eye Color: Fuchsia
Tengen is a tall, broad-shouldered, muscular man with white hair and a light-tanned complexion. His hair is styled with three more noticeable, shorter clumps arching up to fall as bangs between his eyes and on either side of his face. His hair is an irregular length, with the longest strands reaching his shoulders. With one long eyelash flowing to the opposite side of his face, each of his rather tiny, maroon eyes has an inward-slanting appearance. He is quite beautiful, as many ladies and even Zenitsu have said. He now employs his appearance as a tool for his tasks anytime persuasion is required as a result of this.
Tengen’s daily attire for Demon Slayer Corps duty consists of a sleeveless, dark turquoise variation of the normal Demon Slayer uniform, a burgundy fabric wrap over his calves, tattsuke-bakama leggings that are tucked in, and a white-strapped Zri. He also has a pair of blue fingerless gloves that are fastened around his middle finger with a band of white, two large golden rings around his upper arms, and two thinner gold rings, this time two on each side, around his wrists.
In addition, Tengen wears a white headband that covers his hair, revealing only a thin ponytail that hangs behind his head from between its layers. This ponytail is accented with a sizable pale gray headband that is adorned with six light pink gemstones, three large and arranged in a line, and three small and placed in a triangle to the far left. He wears what appears to be red-eye make-up around his left eye, consisting of alternating large and little dots that go inward towards his eye and a chain of smaller, pale blue gemstones that hangs from each side of this headgear, framing his face.
Tengen alters his appearance to match the loss of his left eye and hand after retiring from the Demon Slayer Corps owing to the wounds he received during his battle with Gyutaro, an Upper Rank Six demon. His old headwrap is replaced with a dark eyepatch embellished with what appears to be the last of the jewels from his previous headdress, and his hair now hangs carelessly past his shoulders. He is now dressed in a long, aqua-colored yukata and a black haori.
Tengen is an eccentric and flamboyant person who constantly aspires to be “flamboyant,” has a need for everything to be remarkable and flashy, and even claims to be the god of festivals and flashiness. This is demonstrated when he tries to drag Aoi Kanzaki along with him to the Entertainment District so that she will obediently assist him with a perilous task while getting thrilled about how “flamboyant” Tanjiro Kamado’s blood vessels exploding would be, even spanking her.
Tengen is exceedingly demanding of others due to his flamboyant and enthusiastic demeanor. He treated the Demon Slayers very hard during the Hashira Training Arc and mocked them for having no substance when they failed to survive his stamina training. Additionally, he detests the notion of unattractive things, as seen by Hashira’s outright declaration of his hatred for simplicity.
In front of Tanjiro, Zenitsu, and Inosuke, he is frequently heard boasting that he is “god,” calling them trash, and saying that if he orders them to turn into dogs, they must turn into dogs, and if he tells them to turn into monkeys, they must turn into monkeys. Tengen even makes the trio try their best to charm him and to always play along with him when they beg him for favors.  This was also evident in his first interaction with Upper Rank Six, Gyutaro, who claimed that despite being severely poisoned, he was in excellent condition.
But underneath his flamboyant exterior, Tengen also has a caring side that he only displays to those who are very close to him, most notably his three wives, Makio, Suma, and Hinatsuru. Tengen demonstrates his genuine affection for these women by praising and motivating Makio and Suma after their undercover mission, as well as by telling Hinatsuru that she has finished her mission and to leave danger alone.  Tengen further proclaims that because their lives are so precious to him, they should value them above all else. Tengen also develops a friendlier relationship with Tanjiro, Zenitsu, and Inosuke as a result of the Entertainment District Arc’s events.
Tengen is observed to compare himself to other Hashira, suggesting that he has some form of inferiority problem. Tengen looks up to individuals like Kyojuro Rengoku. That he utterly dismisses the likelihood that he was gifted with talent and that he tells himself he would never be as accomplished as Kyojuro serves as further evidence. Tengen is also seen to suffer remorse for having allowed so many lives to elude him over the years. Tengen began to respect Kagaya Ubuyashiki when Kagaya complimented him for taking the difficult path he did and for fighting to defend human lives despite hiding all of his difficulties and contradictions behind his outspoken and arrogant persona.
Tengen has rejected that philosophy despite being a shinobi who generally prioritizes finishing the assignment above all else after witnessing its impact on his family. His wife or the Demon Slayers under his leadership, in his opinion, should cherish their lives and the lives of innocent people more than their missions or his own. Tengen particularly despised becoming like his father or brother, who had little regard for human life, and wished he could forget everything they had taught him.
Tengen is a Hashira of the Demon Slayer Corps and an extremely strong and skillful fighter. He is the second-strongest Hashira in the current generation and the quickest runner among all Hashira, and he has demonstrated amazing physical feats of strength and speed.  In terms of battle prowess, he could compete with Daki and Gyutaro, two Upper-Rank demons who have faced and dispatched many Hashira in the past.  Daki was likewise easily decapitated by Tengen without her being aware of it, to the point that he didn’t consider her to be an Upper-Rank demon at all.
He managed to safeguard bystanders in the process while being infected by a poison that would normally kill a person instantaneously. This feat of resistance against Daki and Gyutaro’s combined efforts is impressive. Tengen has also shown exceptional ability and accuracy when employing explosives, minimizing damage to the environment while increasing damage to his adversaries. Tengen has improved tactical abilities and keener senses as a result of his shinobi training, particularly his sense of hearing, which was very helpful to him during the course of the combat.
Due to finishing the Musical Score, Tengen was able to battle the Upper Rank on an equal footing even after losing his left hand to Gyutaro. This allowed him to stave off Gyutaro’s assaults, cut off his arm, and hold him down at the cost of his left eye. He tried to deliver a finishing blow, but the poison coursing through his body prevented him from doing so.
Sound Breathing: A breathing pattern that Tengen came up with on his own. Tengen’s Sound Breathing skill appears to combine his musical score method, shinobi skill, enhanced hearing, dual Nichirin cleavers, and anti-demon bombs. He was unable to try a finishing blow because of his body.
Tengen carries two dual Nichirin cleavers, which are in keeping with his colorful demeanor. He wields two enormous amber-colored Nichirin cleavers as his main weapons, each of which has a notch in the sharp end of its blade and is joined at the hilt by a metal chain,which strongly resembles nunchucks. His swords are believed to be extremely explosive, and it is said that no one had ever survived one of his blows before Tengen’s battle with Upper Rank 6.