Z5-A3

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

The first line-up was announced on July 8, 2021.

They made their stage debut on August 14, 2021 @KANDA SQUARE HALL.

Current Members

 * Ichinose Rio (一ノ瀬りお) (Founding member)
 * Shichinohe Asami (七戸あさみ) (Founding member)
 * Toda Roa (兎田髏亞) (Founding member)
 * Hirota Marina (廣田まりな) (Founding member)
 * Tsuno Hirona (津野紘菜) (Joined September 1, 2021)

Former Members

 * Shinkawa Mayuka (新川まゆか) (Founding member; withdrew August 30, 2021)