Z4-A3

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

The first line-up was announced on November 20, 2021.

They made their stage debut on November 21, 2021 @Ebisu Garden Hall.

Current Members

 * Ari-chan (ありちゃん) (Founding member)
 * Ichinose Rio (一ノ瀬りお) (Founding member)
 * Shichinohe Asami (七戸あさみ) (Founding member)
 * Nakano Karen (中野華恋) (Founding member)
 * maasa (Founding member)