Tengen Uzui

Tengen Uzui is a Demon Slayer and the Sound Pillar of the Demon Slaying Corps. He officially retires after sustaining heavy injuries after his battle with Gyutaro, but continues helping the Demon Slaying Corps.

Tengen is happily married to three women: Makio, Suma, and Hinatsuru.

Appearance
Tengen Uzui is a tall muscular young man with white hair though he is usually seen wearing a headwrap featuring a plate covered with jewels of various sizes. He wears a sleeveless version of the standard demon hunter uniform.

After his retirement from the Corps due to injuries sustained during his fight with Gyutaro (he lost an eye and an arm), he is seen during the Pillar Training Arc wearing a patterned yukata with a black haori while replacing his headwrap with a black eyepatch featuring jewels of various size. He held his swords on his back prior to his retirement.

Personality
Tengen is a very eccentric person, always wanting to complete actions "flamboyantly." Although he has displayed an uncaring and forceful attitude towards some people&mdash;he gets excited imagining Tanjiro's "flamboyant" bloodspray, and tries to forcefully haul off Aoi Kanzaki for his mission in the Red Light District&mdash;he also has a caring side that is mainly shown towards his most treasured ones, such as his three wives, Makio, Suma, and Hinatsuru.

Despite being a shinobi that has traditionally valued completing the mission over all else, Tengen has rejected that ideology after seeing its effect on his family. Now, he believes that his subordinates, whether they be his wives or the Demon Slayers under his command, should value their lives, and the lives of innocents, over their missions or his own.

History
Tengen was one of nine children from a surviving line of shinobi. However, seven of his siblings died by the time he was 15, leaving only him and the second-youngest brother. The harsh, abusive training their father made them endure made his brother become just like their father: uncaring towards life and using people as tools.

Disgusted by this worldview, Tengen chose to rebel with the values that were instilled in him during his youth. He instructed his wives to value their own lives first, innocent civilians second, and his own last, even though it completely defied their training.

Some time later, they were taken in by Kagaya Ubuyashiki and Tengen joined the Demon Slayers. He became a Pillar some time before Sanemi Shinazugawa, as he was present at Sanemi's first Pillar meeting and expressed annoyance when the new Pillar confronted their leader.

Natagumo Mountain Arc
Tengen was present with his fellow Pillars when Tanjiro Kamado awoke.

Functional Recovery Training Arc
Shinobu Kocho noted that Tanjiro was on trial, but Tengen simply stated that he would cut Nezuko Kamado's head off "flamboyantly", agreeing with and repeating this latter word when Gyomei Himejima suggests they kill her. When Tanjiro reiterated his belief that Nezuko will not harm any humans, the Sound Pillar told him not to give them lip service, but rather a more complete explanation. He then remained silent when Mitsuri Kanroji asked if they should be dealing with their subordinate's trial without Oyakata-sama's input. After Tanjiro headbutted Sanemi Shinazugawa, Tengen looked at Mitsuri when she laughed with a neutral expression.

Demon Train Arc
Tengen recieves news of Rengoku's death at the hands of Upper Moon Three from a Kusurugi Crow.

Red Light District Arc
Tengen enters the arc by kidnapping several girls from the Butterfly Estate to assist him on his mission. Tanjiro, Zenitsu and Inosuke confronts him and volunteers to go on the mission in the girls' stead. The Sound Pillar agrees and reveals that his mission is to investigate the Red Light District and re-establish contact with his three wives that he sent in to spy on the location, but had recently lost contact with. After having the three boys cross-dress as girls and selling them to individual brothels, Tengen Uzui plays a more background role for a few chapters as the boys gather information on the possible demon lurking within the district. After it's revealed that most of his wives had been captured and missing, he immediatly goes to rescue the nearest one, therefore not being present to aid Tanjiro in his fight against Upper Moon Six, Daki. Tengen arrives back on the scene just in time to apparently finish off Daki with a single attack, but this is quickly proven false when Daki reveals she cannot be killed because of her Demon blood connection to her brother, Gyutaro, the true Upper Moon Six. In the fierce ensuing battle, Uzui is immediately weakened by Gyutaro's poison, and by the end of the fight had lost a hand. As he lay dying from the poison, he lamented on his inability to say some flamboyant last words, until he was saved by the timely intervention of Nezuko Kamado using her Blood Demon Art to burn the poison out of his system. After this, Tengen informs the freshly arrived Serpent Pillar, Obanai Iguro that he's officially retiring from the Demon Slayer Corps.

Pillar Training Arc
Despite officially retiring, Tengen assists in Pillar Training along with his wives.

Dimensional Infinity Fortress Arc
Tengen and Shinjuro Rengoku were located in another section of the Ubuyashiki estate when it was taken into Muzan Kibutsuji's Dimensional Infinity Fortress. They stand guard outside of the room Kiriya, Kanata, and Kuina Ubuyashiki are located in as the surviving Ubuyashikis map out the fortress and give instructions to the Demon Slayers.

Natural Abilities
Much like his fellow Pillars, Tengen has displayed numerous superhuman abilities that even allows him to easily overpower and outclass demons in a fight and even allows him to battle on equal footing against the Upper Moons of the Twelve Demon Moons.
 * Enhanced strength: Tengen has displayed incredible physical strength during his bout with Gyutaro and Daki. One example is him being to use his blades with great proficiency while only holding them at the tip and with only two fingers.


 * Echolocation: Tengen is shown to possess superhuman hearing similar to Zenitsu, but being far more advanced than his, as seen when it allowed him to easily hear noises deep underground. This allowed him to immediately figure out that there where underground tunnels and caves directly beneath him by analyzing the sounds reflected and resonated by the taverns and accurately locate and even guess the number of people inside by listening to the sound bounced from their physical bodies.

Swordsmanship
Breath of Sound (の): A breath style unique only to Tengen. The Sound Breath is branched out from the Breath of Lightning. Tengen has developed a unique battle formula called the Score, which involves reading his opponents movements and deconstructing them into sound. He can then analyze the rhythm of their movements allowing him to take advantage of their openings to a much greater effect. In conjunction with this he uses small but powerful anti-demon bombs, made with a special gunpowder, which proved capable of overpowering an Upper Moon Demon briefly.
 * First Style: Thunder (ノ) - he lifts his twin swords above his head and slams them down with great force creating an explosion with his bombs, causing a loud sound resembling thunder.
 * Second Style:
 * Third Style:
 * Fourth Style: Death Knells of Avīci (ノ) - he holds his swords apart and spins them rapidly in conjunction with releasing his bombs, making this technique a combination of offense and defense.
 * Fifth Style: Symphony of Shrill Strings (ノ) - he holds one of his swords with a reverse grip, and spins the other using the chain that connects them. He couples this by also releasing numerous bombs to detonate. This technique was able to overpower an Upper Moon demon.

Trivia

 * Before Tengen became a Demon Slayer then Pillar, he was originally a Shinobi as stated by Gyutaro.
 * In his initial design; Uzui was:
 * Less muscular with a far thinner build,
 * Had of his face covered in bandages, making it hard for others to see what he looks like,
 * Wore sleeves due to not wanting his "arms sunburned(?)" according to the author.

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Тенген Узуй