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Tsukihi, the main character of Tsukihi Phoenix, is one of Koyomi's sisters. She's the youngest of the Araragi family.
Tsukihi appears to be a young girl with black hair and dark gray irises. She wears a sunny side-up egg-shaped hair clip on the side of her hair like her older sister Karen, although Tsukihi has hers on the right side. Like the rest of the Araragi siblings, has an ahoge. She also has a habit of changing her hairstyle constantly. Her wardrobe almost exclusively consists of bright-colored yukatas and
kimonos which vary in length. Unlike her sister Karen, she prefers doing indoor activities. Contrary to her personality, she is short-tempered to the point that Koyomi describes her as having hysteria. Rosokuzawa is mentioned to be Tsukihi's boyfriend by her brother, and she says she's in love with him but has a chaste relationship. Despite being a member of the Fire Sisters, Tsukihi admits that she doesn't have the drive to do things like her older sister, although she says that she shares her siblings' belief in justice.[1]
Also like her sister, she doesn't believe in oddities or the supernatural. Trivia
Tsukihi's first name (月火) literally means "fire of the moon". However, the kanji can also be read as "getsuka", which means "Monday and Tuesday". Alternatively, it can be written as "月日" which means "time." Tsukihi's hair seems to grow at a very fast rate, likely as a trait of her phoenix regeneration ability. This is likely the reason she constantly changes her hairstyle. Although lacking major roles in Bakemonogatari, she and Karen narrate the previews for the next episode. They continue this role for a large portion of the series.
