A short, blond 17 year old Majima Academy student and the only member of the Astronomy Club.Tsukiyo is frequently on the school rooftop in her private observatory, especially to watch the moon. She lives an idealistic life, focused only on "beautiful" things. She does not like to display emotions, as it is considered ugly and not "beautiful". Her doll, Luna, is the only one she holds dear. Tsukiyo yearns living on the moon with Luna, a metaphor for her desire to escape reality.
Source from Wikipeida