Tamayo

Tamayo is a major supporting character of Demon Slayer: Kimetsu no Yaiba. She is a demon, a skilled doctor, and close ally of Tanjiro Kamado.

During the final confrontation between humanity and demons, Tamayo, along with Yushiro, joins forces with the Demon Slayer Corps to develop a drug that would aid in the defeat of Muzan Kibutsuji.

Appearance
Tamayo is a petite young woman with long, dark brown hair, parted in the center and worn braided back into a large, low bun, which is held in place by a floral tama-kanzashi hairpin. She has large, gentle eyes that initially do not possess pupils, only a haze of lavender that fades to dark purple the higher it goes, and notably red lips in contrast to her pale complexion. She is noted to have an attractive appearance by Tanjiro and Yushiro.

Tamayo wore a dark purple medium-lengthed hōmongi kimono that is decorated with wavy pale purple tree branches and red flowers, and a cream-colored taiko musubi obi to secure it around her waist, as well as plain white socks and violet zōri sandals.

During the confrontation between the Demon Slayer Corps and Muzan, Tamayo's eyes are shown to have black cat-like pupils and Yushiro's talisman scattered in her kimono.

In her past, Tamayo wore her hair tied in a low ponytail.

Personality
Tamayo is a gentle, wise, and incredibly intelligent individual. Having devoted most of her life the researching of demons and human transformation into one, she was one of the most knowledgeable individuals to be shown. Despite the generally antagonistic and virulent relationship between humanity and demons, she shows a great deal of kindness towards humans. She made it a part of her mission to assist injured or sick individuals with her expansive medical knowledge — Tanjiro Kamado being among them.

Tamayo had a strong preference against violence: instead of killing humans for their blood, she chose to buy blood from consenting donors to survive. She was adamant in teaching her assistant, Yushiro, against violence and often reprimanded him for his habit of hitting others. She was one of the few demons who, after her transformation into one, was able to regain and retain her human emotions.

However, despite her usual kind, caring, and considerate disposition and personality, Tamayo has displayed a more cruel and vicious persona upon confronting Muzan. This was seen when she gleefully boasted to him that she' had successfully created a human-transforming drug and managed to inject it into him, and later, upon being devoured and eaten, reduced to mere cells inside his body, Tamayo again showed her cruel side as she revealed the real effects of her drugs. Muzan hinted that this vicious personality was Tamayo's original personality back in her earlier years as a demon, though his antagonistic association with her makes this dubious. It is possible that Tamayo's stark change in demeanor is only triggered when being with Muzan due to the great hatred she bore of him.

During her time as a servant of Muzan and prior to meeting Yoriichi Tsugikuni, Tamayo was shown to have a more docile personality, likely a result of her realizing how impossible it was to defeat Muzan with her power to avenge her family. However, this changed upon her witnessing Yoriichi's strength and how close he came to killing Muzan, as Yoriichi noted that he saw a glint of hope in her once-deadpan eyes as she realized that he'd almost killed her former master, showing that, upon seeing Yoriichi's power, Tamayo's resolve to avenge her family was reignited.

Tamayo hated her identity as a demon: when she was first encountered by Tanjiro and he had deduced that it was her Blood Demon Art that assisted him, she mentioned that she could still be called a human. Upon learning that Nezuko had recognized her as a human and hugged her after helping defeat Susamaru, Tamayo pulled her in closer and tearfully thanked Nezuko. During her skirmish with Muzan to inject her drug into him, Tamayo declared that she had no intentions of being a demon and simply want to survive her illness and be with her family, showing that Muzan had tricked her into undergoing a transformation without speaking of the consequences.

Abilities
Overall Abilities: As one of the oldest to ever exist, predating the Twelve Kizuki entirely, and armed with unparalleled knowledge regarding the science and physiology of demons, Tamayo is a very powerful demon. She was able to enchant and distract a platoon of police officers, preventing them from seeing herself, Yushiro, and Tanjiro in plain view and later managed to easily lull Susamaru into accidentally saying Muzan's name, despite the extreme fear nearly all demons possess of him, through the use of her Blood Demon Art. However, her greatest weapon is her vast knowledge regarding medicine and the inner workings of demons. She was able to reverse the transformation of a demon, something that was once thought to be entirely impossible, and played a pivotal role in the eventual death of the Demon King Muzan Kibutsuji by developing a potent drug that drastically diminished his once unequalled physical abilities.

Medical & Pharmaceutical Skills: What Tamayo lacks in combative prowess, she more than compensates with extremely honed skills in the fields of medicine and pharmaceuticals, possessing the skill to alter her own body so she could survive on only a small amount of human blood. She was also able to turn the terminally ill Yushiro into a demon without Muzan's blood. Before the final battle, she turned Chachamaru into a demon as well. She later managed to free the Asakusa Demon of Muzan's influence and regain his consciousness using Nezuko Kamado's blood. To further showcase her pharmaceutical skill, Tamayo was also able to assist Insect Hashira Shinobu Kocho in saturating her body with deadly Wisteria poison without it so much as causing her the slightest illness; a tactic the Hashira would later use effectively against Upper Rank Two, Doma.


 * Anti-Blood Demon Coagulant: Tamayo created this medicine to prevent a demon's Blood Demon Art from progressing. Yushiro used this medicine to cure Zenitsu Agatsuma after his fight with Kaigaku.


 * Anti-Kibutsuji Drug: It was later revealed that by teaming up with Yushiro and Shinobu, Tamayo had successfully created an extremely powerful, four-stage drug that could gravely weaken Muzan. Once administered into him, its effects would be strong enough to significantly harm him despite his immense physical resistances and abilities. The first stage of the drug consisted of the same human-conversion stage that was included in the drug given to Nezuko.

Blood Demon Art
Blood Bewitchment: Tamayo's Blood Demon Art revolves around drawing her own blood, and casting various support-type spells using the scent of said blood.

Techniques

 * -|Description =
 * Scent of Illusory Blood, Visual Dream (の) - A hallucination that hinders the vision of the affected by creating beautiful flower patterns around them.


 * Magical Aroma of Daylight (の) - A spell that acts as a truth serum, causing brain function to decrease and will make the recipient confess their lies and not keep their secrets.


 * -|Demonstrations =

Game Exclusive Techniques

 * Magical Aroma of Daylight, Resonance (の・) - An attack that causes harmful effects to the victim and leads them to openings for other sources.


 * Scent of Illusory Blood, Visual Dream: Grapple (の・みち) - Yushiro pummels his opponent with multiple strikes with Tamayo aiding him by using her Blood Demon Art, Blood Bewitchment: Scent of Illusory Blood, Visual Dream. This is ended by Yushiro performing an uppercut palm strike.

Trivia

 * Tamayo's name contains the kanji for "bead, pearl, gem, jewel" (珠) and "world" (世).
 * Tamayo was ranked 18th in the first character popularity poll, with 138 votes.
 * Her Japanese voice actress, Maaya Sakamoto, is married to Obanai's Japanese voice actor, Kenichi Suzumura.
 * Tamayo is at least 500 years old, as she was shown thriving during the same time as Yoriichi Tsugikuni and was transformed into a demon sometime before that.
 * After her encounter with Yoriichi and escaping Muzan's influence, she survived on eating animal and human corpses (later transitioning to human blood). She refused to obey her demonic instincts and never attacked humans, despite how much pain she felt.
 * Tamayo likes cleaniness, so if anything is messy or dirty, it bothers her and she cannot concentrate.

Quotes

 * (To Tanjiro Kamado) "You still use... the term "person"... to refer to even a transformed demon. And you're trying to save him. Allow me, then, to lend you a hand."
 * (To Muzan Kibutsuji) "Today... is... the day... you... will fall... into... hell..."
 * (To Muzan Kibutsuji) "The drug... I used... turns you into a human... and... I'm not telling you. Why don't you try using all those useless brain cells you now have?"
 * (To Muzan Kibutsuji) "Well, well. It looks like the death you've hated for so long is right before your eyes now."
 * (To Muzan Kibutsuji) "I don't need to be stronger than you to kill you. I can just make you weaker. Just as you'll do whatever it takes to stay alive, I... No, we will do whatever it takes to kill you."

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