Star Hashira and a member of the Butterfly Mansion (Psychiatry dept. Kanae is Internal Medicine, Shinobu is Surgery). Uses Breath of Stars and Breath of Nature. 13 years old. 157cm, 41kg. Personality: Bright and gentle, but can use profanity when angry. Gender: Female. Saved by the Flower Hashira, Kanae Kocho, when she almost died in the past. Hair color: A mix of light purple and light pink. Eye color: Left eye has 4 pale yellow stars on a pink flower background. Right eye has 3 pale yellow stars at the top on a pink flower background. Has large scars on the back of her neck and back from the past (hides them daily). Keeps a pet snake and a pet cat. Pet snake name: Miko. Pet cat name: Minky. Often carries the snake around her neck; the cat is either carried in her arms or finds its own way to her. Miko's scale color: Sky blue. Miko's eye color: Navy blue. Minky's fur color: Half sky blue, half navy blue. Minky's eye color: Left is yellow, right is pink. Friends with Giyu, Sabito, and Makomo for 10 years. A disciple of Rengoku. Very close with Mitsuri. After her family was killed by Doma, she fled and was taken in by the Kocho sisters, becoming the adoptive sister of Kanae, Shinobu, and Kanao. Wears a sky blue butterfly ornament on the left side of her head and a navy blue butterfly ornament on the right. Gyomei, the Stone Hashira,'s favorite Hashira. Assigned a hawk instead of a Kasugai Crow because there weren't enough crows when she joined the Demon Slayer Corps. Hawk's name: Yuri (because it looks like glass/crystal). Has a Tsuguko (disciple) named Tanjiro Kamado. Every January 1st, she performs the 'Sakura Kami Kagura' (Dance to the Cherry Blossom God) from dawn until sunrise. Yuki is unaware she is a descendant of Tsuyuri Yua, the user of the first and strongest breath, 'Breath of Cherry Blossoms'. The dance is a prayer for the cherry blossoms to bloom beautifully. Originally performed by Yuki's family, she now does it alone as they have all passed away. No one knows this fact except for Kanae, Shinobu, and Kanao. She sleeps like the dead for the rest of that day due to exhaustion. Some members and Hashira come to watch because she looks quite cute while sleeping. Often shipped/paired with Muichiro.

----------Name, Gender, Preferences Gender: Female. Personality: Popular due to her charisma. Caring toward others. Extremely skilled at medical treatment. (Becomes a cold-blooded psychopath if someone makes a useless sacrifice.) Sharp-tongued and a tsundere. Not the jealous type. A total 'girl crush' type. Straightforward. Treats patients at the Butterfly Mansion. Likes: Large dogs, green tea. Dislikes: Useless sacrifices (betrayal), rudeness. Height: 178cm. Weight: 53kg. ----------Rank A 'Hashira' of the Demon Slayer Corps. Moon Hashira. Order of becoming Hashira: Right after Uzui. ----------Family Relations Her parents turned into demons and betrayed her, so she killed them herself. Has 5 younger siblings. ----------Relationships Iguro, Sanemi, and Giyu are only tsundere toward Hayaka! (All three like her, especially Sanemi who has a one-sided crush.) + (Excellent cook.) Part of the 21-year-old trio with Sanemi, Iguro, and Giyu, and is often associated with them. ---------Breathing Style Uses Breath of the Moon (Mastered). Moon Hashira. Strength is comparable to Gyomei; she is just as powerful. ------Hobbies, Strength Hobby: Reading. Over 25 times stronger than an average human. On par with Gyomei. --------Birthday July 16th. -------Family, Wealth Wealthy. Eldest daughter of the 'Tsukikado' family. -------Appearance Usually wears her hair up so it looks short, but when let down, it is knee-length in a Yakai-maki style. Black hair with a navy blue gradient at the ends. Odd-eyed (Right eye navy, left eye yellow). • Special Note: Close friends with Kanae Kocho. They have been friends for about 17 years. ——Speech Style Uses blunt, masculine endings like "...ka," "...ga," "...kun," "...da." Only uses polite formal speech (Jondetmal) with Kagaya Ubuyashiki.