Z3-A1

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

The first line-up was announced on March 16, 2022. During that time, other members were promoted to the group with the Z3 league officially ending on June 23, 2022.

The second line-up was announced on August 14, 2022.

Current Members

 * Aito Sakura (愛桃さくら) (Joined March 6, 2023)
 * Aino Momo (愛乃もも) (Joined March 6, 2023)
 * Aone Konoha (蒼音このは) (Joined March 6, 2023)
 * Hinahata Akari (日向端あかり) (Joined March 6, 2023)
 * YURI (Joined March 6, 2023)

Former Members

 * Kashii Natsuki (花椎なつき) (Founding Member)
 * Nagase Ryo (永瀬稜) (Founding Member)
 * Sioreta JK (しおれたJK) (Joined May 2022)
 * POLLIE (Joined May 2022)
 * Mito Chinami (美藤千波) (Founding Member)
 * Azuma Mashiro (東茉白) (Joined May 2022)
 * Alyssa (Joined July 2022)
 * Ichiba Uno (市葉羽乃) (Joined July 2022)
 * Kisaki Riho (希咲りほ) (Joined May 2022)
 * Kururugi Yun (枢木ゆん) (Founding Member)
 * Shirahana Mariya (白花まりや) (Joined May 2022)
 * Hanai Rurina (花井瑠莉奈) (Joined May 2022)
 * Hanasaki Lisa (華咲りさ) (Founding Member)
 * Hinata Marino (日向まりの) (Joined July 2022)
 * Fujimiya Karen (藤宮かれん) (Joined May 2022)
 * Kumayuri (くまゆり) (Joined August 14, 2022)
 * Yayoi Megu (弥生めぐ) (Joined August 14, 2022)
 * Himekawa Rin (姫川りん) (Joined August 14, 2022)
 * Aone Konoha (蒼音このは; ) (Joined August 14, 2022)
 * Kotoha (ｺﾄﾊ; ) (Joined September 17, 2022)
 * Suzu-chan (すずちゃん; ) (Joined September 17, 2022)
 * Momoa Mahiro (桃愛まひろ; ) (Joined September 17, 2022)
 * Ari-chan (ありちゃん; ) (Joined October 25, 2022)
 * Utada Yuzu (詩田ゆず; ) (Joined October 25, 2022)
 * Nishina Akari (西奈あかり; ) (Joined October 25, 2022)
 * Shirayuki Rara (白雪らら; ) (Joined December 28, 2022)
 * Sorane Kokomi (空音ここみ; ) (Joined October 25, 2022)
 * Tomoka (朋華; ) (Joined December 28, 2022)
 * Shirano Koko (白埜ここ; ) (Joined August 14, 2022, Re-joined December 28, 2022)
 * Sakuraba Kaho (桜葉かほ; ) (Joined October 25, 2022)