|Kanji||桜 月美（さくら つきみ）|
|Relatives||Hinako (big sister)|
|Manga Debut||Chapter 1|
She is a well behaved child and always tries her hardest. She is very kind and forgiving when that guy who tore up her drawing and Machine for killing Akira (of course she wasn't willing to forgive him but she later did after Akira was back.) She tend to talk in a third person.
- Hinako: Her big sister. Because their parents are overseas, Tsukimi has come to see her as a surrogate mother.
- Akira Kongou: The two quickly become friends after Akira helps her find Hinako after getting lost. The bond between the two is almost paternal.
- Machine Banchou: The two become close friends after he mistakes her for the dead Doctor Tsukina. Tsukimi teaches him the meaning of life and death and helps him become his own person.