Z3-A4

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

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

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

Current Members

 * Ikeda Haruki (池田遥希; ) (Joined October 25, 2022)
 * Utada Yuzu (詩田ゆず; ) (Joined December 28, 2022)
 * Harukaze Rina (春風りな; ) (Joined December 28, 2022)
 * Minazuki Reine (水無月黎音; ) (Joined November 29, 2022)
 * Riria (りりあ) (Joined January 14, 2023)

Former Members

 * Fujimiya Karen (藤宮かれん) (Founding Member)
 * POLLIE (Founding Member)
 * Yuzuki Misato (雪月みさと) (Founding Member)
 * Tsuno Hirona (津野紘菜) (Joined May 2022)
 * Minase Maria (水瀬まりあ) (Founding Member)
 * Alyssa (Joined May 2022)
 * Ide Ryoko (井出涼子) (Joined May 2022)
 * Usami Momo (うさみもも) (Joined June 2022)
 * Kanekawa Miyabi (金川雅) (Founding Member)
 * Shirasaki Hikari (白咲ひかり) (Joined June 2022)
 * Yukino Mahiro (雪野まひろ) (Joined July 2022)
 * Kisumi Megu (姫菫めぐ) (Joined August 14, 2022)
 * Sawada Nana (澤田なな) (Joined August 14, 2022)
 * Hazuki Rio (はづきりお) (Joined August 14, 2022)
 * Aino Momo (愛乃もも; ) (Joined September 2022)
 * Kiri (きり; ) (Joined September 2022)
 * Yamada Nao (山田菜緒; ) (Joined September 2022)
 * Wakamiya Yuriko (若宮ゆりこ; ) (Joined August 14, 2022)
 * Nagase Ryo (永瀬稜; ) (Joined August 14, 2022)
 * Hiiragi Aoi (柊あおい; ) (Joined October 25, 2022)
 * Maria (まりあ; ) (Joined October 25, 2022)
 * Shirano Koko (白埜ここ; ) (Joined November 29, 2022)
 * Aino Momo (愛乃もも; ) (Joined November 29, 2022)
 * Uyugu (うゆぐ; ) (Joined October 25, 2022)