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

 * Hazuki Rio (はづきりお) (Joined August 14, 2022)
 * Nagase Ryo (永瀬稜) (Joined August 14, 2022)
 * Wakamiya Yuriko (若宮ゆりこ) (Joined August 14, 2022)
 * Sawada Nana (澤田なな) (Joined August 14, 2022)
 * Kisumi Megu (姫菫めぐ) (Joined August 14, 2022)

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)