Haruka Kito (鬼頭 はるか Kitō Haruka) is a high schooler and disgraced manga artist who becomes Oni Sister (オニシスター Oni Shisutā), the Yellow Ranger of the Donbrothers. Sonoi later briefly turns her into Taiyoki (太陽鬼 Taiyōki, lit. Sun Demon) until Taro arrived and snapped her out of it. Haruka is 17 years old at the beginning of Donbrothers. Her birthday is May 25th, 2004. She is the youngest and the only female member of the Donbrothers team.