Now crying, Tamayo screams that she wouldn't have become a Demon if she knew that would be the outcome, since all she wanted was to recover from her disease so she could see her kids grow up. A short while later, as Tanjiro and Nezuko prepare to say their goodbyes to the good Demons, Tamayo explains that she and Yushiro will be leaving their house as it's too close to Muzan, and she also suspects she will be exposed as a Demon rather soon. She then introduces herself and her colleague, answering Tanjiro's earlier question by explaining her unique ability to manipulate her body at whim, as well as her and Yushiro's shared needing of only a little human blood to survive. Tamayo (珠 (たま) 世 (よ), Tamayo?) Tamayo smiles, understanding his decision, and wishes him the best on his travels as he and his sister leave their house.Tamayo appears once again after Muzan's attack on the Ubuyashiki residence, shortly after Muzan says that Tamayo is one stubborn woman and that her hatred towards him is unjust, since it wasn't him who killed her family, it was herself. After a period of time, Tamayo regained her sanity and proceeded to set up a life in which she could study treatments for Demonic cures. is a traveling companion of Tamayo and close ally of Tanjiro Kamado. Having devoted most of her life to researching the science behind However, despite her usual kind, caring, and considerate disposition and personality, Tamayo has displayed a more cruel and vicious persona upon confronting Muzan. Yushiro (愈 (ゆ) 史 (し) 郎 (ろう), Yushirō?) He was turned into a Demon by Tamayo. Muzan Kibutsuji turned her into a Demon. This boy became known as Later, at her hideout, Tamayo welcomes Tanjiro to her abode, explaining the status of the earlier Demon and his wife to the Demon Slayer and reprimanding Yushiro for resorting to violence at Tanjiro's questions. Tamayo says that Tanjiro must allow her two things in order to create this remedy: the blood of strong Demons, such as the Suddenly, a large handball tears through the room, and Yushiro jumps in front of Tamayo in an attempt to protect her from it.The two move as far from the center of the battle as possible, and Tamayo yells once again to Tanjiro that he mustn't worry for them, while Yushiro gives him advice for what to do against the Demon's handballs and lends him his Demon sight.Shortly after, as the battle draws somewhat to a close, Tamayo approaches Susamaru, asking her if she knew Muzan's true identity and telling her that he's nothing but a coward. Eventually leading to him allowing her to leave with her life, despite knowing of the repercussion from the rest of the Demon Slater Corps for not only failing to kill Muzan, the demon progenitor and the main enemy of the Demon Slayers, but for also allowing a Demon as powerful as Tamayo to escape. One of the more interesting characters from the series is the demon, Tamayo. Somewhat confused, Tamayo explains that Nezuko has been like this towards them ever since the battle ended, and Tanjiro smiles and says that it must be because she recognizes them as part of her family since, due to their humane personalities, Nezuko sees them as people she must protect, even though they're actually Demons. She further explaines that she is the one who transformed Yushiro into a Demon, and reprimands the latter once more for getting violent with Tanjiro.Tanjiro then asks her if there's a way to turn Demons back into humans, to which she answers that there may well be one. As Muzan places his hand on Tamayo's head and begins to crush her eye with his thumb, to reopen the wounds further, Muzan goes on to remind the Demon of how she killed even more humans after her family as she fell into despair, which Tamayo then admits to. After reprimanding Yushiro once again for his overly violent behavior, she explains that she currently cannot hope to perform this procedure, as first she needs to research and develop it. These emotions, along with the glint of hope he saw in her eyes as she saw Muzan's near death and defeat, prompted Yoriichi to spare Tamayo and console her due to realizing their mutual hatred for Muzan. Before, Tamayo wore her hair tied in a low ponytail and had slitted pupils. Tamayo was a gentle, wise, and incredibly intelligent individual. Although the exact order of events are unknown, eventually it was seen that Tamayo had seemingly become a subordinate to Muzan and had seemingly become subservient to the demon progenitor, as seen during Muzan's confrontation and subsequent battle against This likely hints that at one point, Tamayo had attempted to kill Muzan and avenge her family and him turning her into a However this all changed upon seeing the battle between Muzan and Yoriichi, where upon seeing the Demon Slayer completely overpowering and nearly dealing a death blow on the Demon Progenitor, Tamayo was seen to have been completely dazzled by the sheer power of the Demon Slayer and upon seeing Muzan defeated and near death, her spirit to kill and defeat him was seemingly reignited. RELATED: Demon Slayer: 5 Things We Want In The Next Season (& 5 That We Don't) Muzan hinted that this vicious personality was Tamayo's original personality back in her earlier years as a Demon, and she slowly changed into the wise and considerate woman she's now known as time went by. Despite this, as seen during the flashbacks hundreds of years before Muzan's meeting and battle with Though she tried to stay away from fights, Tamayo is an incredibly strong Demon.

After Muzan's escape by scattering himself to pieces, Tamayo was shown to have reacted in visible anger at the Demon Progenitor's escape and expressed frustration at him seemingly obtaining immunity to decapitation. Demon Slayer: Kimetsu no Yaiba has no scarcity of characters.