Z3-C1

 is a group within Zero Project. The theme of the group is royalty.

The first line-up was announced on March 16, 2022.

Current Members

 * Amatsuka Mio (天使みお; ) (Joined November 29, 2022)
 * Amuro Kotori (安室ことり; ) (Joined November 29, 2022)
 * Sakurazawa Kotone (桜沢琴音) (Joined May 24, 2023)
 * Tadano Honyon (只野ほにょん) (Joined March 6, 2023)
 * Tsukishima Mimika (月島美々花) (Joined May 24, 2023)

Former Members

 * Sioreta JK (しおれたJK) (Founding Member)
 * Azuma Mashiro (東茉白) (Joined March or April 2022)
 * Takamine Yukina (高峯雪菜) (Founding Member)
 * Wakamiya Yuriko (若宮ゆりこ) (Joined March or April 2022)
 * Ari-chan (ありちゃん) (Joined May 2022)
 * Kashii Natsuki (花椎なつき) (Joined May 2022)
 * A-rin (あーりん) (Joined Late May or June 2022)
 * Aino Momo (愛乃もも) (Joined July 2022)
 * Aone Konoha (蒼音このは) (Joined Late May or June 2022)
 * Asakura Yuzuki (浅桜ゆづき) (Joined Late May or June 2022)
 * Kanzaki Chisato (神崎千聖) (Joined July 2022)
 * Shirano Koko (白埜ここ) (Joined July 2022)
 * Sorane Kokomi (空音ここみ) (Joined July 2022)
 * Himekawa Rin (姫川りん) (Joined Late May or June 2022)
 * Mizuhata Marina (水畑まりな) (Joined July 2022)
 * Mori-chan (もりちゃん) (Founding Member)
 * Yayoi Megu (弥生めぐ) (Joined July 2022)
 * Kanzaki Chisato (神崎千聖; ) (Joined November 29, 2022, Graduated December 28, 2022)
 * Inoue Tsumugi (井上紬葵; ) (Joined November 29, 2022)
 * Umesaki Risa (梅咲りさ; ) (Joined November 29, 2022)
 * Sakurazawa Kotone (桜沢琴音; ) (Joined December 28, 2022)
 * Harupon (はるぽん; ) (Joined December 28, 2022)
 * Aizuki Shino (藍月しの) (Joined December 28, 2022)
 * Aito Sakura (愛桃さくら; ) (Joined December 28, 2022)
 * Hiiragi Aoi (柊あおい; ) (Joined December 28, 2022)
 * Ichigozaki Mayu (一期崎まゆ; ) (Joined December 28, 2022)
 * Nono (ノノ; ) (Joined December 28, 2022)
 * Saito Hinata (齋藤ひなた) (Joined December 28, 2022)