Suma [Demon Slayer.]

Nooo my tengen is dead... She was crying.

At some point of her life, Suma married Tengen Uzui, along with Makio and Hinatsuru, although she volunteered to be his wife while the other two were arranged marriages. After she left the clan, her family journeyed to see Kagaya Ubuyashiki in order to fight as a part of the Demon Slayer Corps. At some point in the past, Suma was instructed alongside Makio and Hinatsuru by Tengen on his personal ideology: to put their own lives first, then respectable humans, and lastly himself. Later, when Makio questioned this in private as it went against what they had been taught as kunoichi, Hinatsuru assured her that as long as she was okay with it, Tengen would also approve of it. She also wished for the four of them to retreat from the front lines as soon as they defeated an Upper Rank. When investigating the Yoshiwara Entertainment District, Suma was assigned as an oiran to the Tokito House. However during the investigation, she disappeared and lost contact with Tengen Uzui. When Tanjiro arrives at the Tokito house in disguise, he overhears the rumor that Suma had run off with a wealthy suitor according to her diary, but is immediately doubtful sensing that something more sinister is occurring. Later on, Inosuke Hashibira begins to search for the demon and stumbles upon a cavern with a hanging obi holding multiple people captive. As he begins his assault, he manages to free multiple captives including Suma and Makio. The two women proceed to defend the freed captives from being reabsorbed while Inosuke fights the obi. Then a large thundering sound is heard coming from above the cave, and Tengen bursts through the ceiling, rapidly slashing large portions of the obi. He lets the two women know that he's proud of them causing them both to emotionally tear up. Despite wanting to keep his wives safe, Suma and Makio persuaded Tengen to pursue the demon instead.