Nijiiro Aster

Nijiiro Aster (虹色アステール) was an idol group formed in late 2020 and set to debut in March 2021. All members are also cast members at the Nijiiro Spectre concept cafe. The group is produced by Tachibana Riko.

On November 25, 2021, they announced the end of their activities as a group.

Final Line-up

 * Shiina Saika (椎奈さいか; )
 * Shizaki Nao (紫咲なお; ) (Joined January 17, 2021)
 * Mebuki Runa (芽吹るな; ) (Joined May 2021)
 * Minami Rika (海南りか; ) (Joined May 2021)
 * Tachibana Saki (橘さき; ) (Joined June 2021)

Former Members

 * Sakura Seimi (咲良せいみ; ) (Left January 13, 2021)
 * Fujisaki Aya (藤咲あや; ) (Left January 13, 2021)
 * Hinata Ririka (日向りりか; ) (Left January 13, 2021)
 * Hazuki Misa (葉月みさ; ) (Left May 21, 2021)
 * Sorano Hana (空乃はな; ) (Left May 21, 2021)
 * Hoshimiya Emo (星宮えも; ) (Left September 2021)
 * Aizono Haruka (愛園はるか; ) (Joined May 2021, left September 2021)
 * Hinata Aya (日葵あや; ) (Joined May 2021, graduated October 2021)