Chitose Kaginoji

Apparently, [Tsukasa](https://anilist.co/character/131106/Tsukasa-Yuzaki) saved her from falling off a cliff when they were children. Chitose wants to use her own life for the sake of [Tsukasa](https://anilist.co/character/131106/Tsukasa-Yuzaki) to pay her back. She obviously doesn't want [Tsukasa](https://anilist.co/character/131106/Tsukasa-Yuzaki) falling into [Nasa](https://anilist.co/character/130944/Nasa-Yuzaki)'s hands. She has two maids: [Aurora](https://anilist.co/character/137516/Aurora) and [Charlotte](https://anilist.co/character/137517/Charlotte). Chitose has a personality that quickly bends from being strong to whining. She considers [Tsukasa](https://anilist.co/character/131106/Tsukasa-Yuzaki) her sister.

(Source: Tonikaku Kawaii Wikia)