She also wrote the lyrics and sang the ending themes to the first two seasons of Rozen Maiden as well as the OVA under the name Kukui, with Myu.
Haruka Shimotsuki started her career in 1999 beginning with singing main themes for games, and writing and composing songs.
The group has a seventy-two-page dōjinshi, one CD entitled Tsukioi no Toshi (also called Leozet Lag Ecliss in its own original language, the Lag-Quara language), a manga and novel text story book that was twenty-eight pages, and a single CD with the same name as the book, Lip-Aura, a side-story of Tsukioi no Toshi.
[2] She gained attention after singing the ending theme "Tōmei Shelter" for Rozen Maiden under the name Refio+Shimotsuki Haruka.
In the PlayStation 2 game Ar tonelico: Melody of Elemia, she composed and performed the songs of one of the heroines, Aurica Nestmille, and took part in singing the ending theme "EXEC_PHANTASMAGORIA/.".