Z5-A1

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

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

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

Current Members
None currently

Former Members

 * Sakura (さくら) (Founding member; withdrew July 22, 2021 )
 * Tachibana Kirari (橘きらり) (Founding member; withdrew September 25, 2021 )
 * Sato Aya (佐藤彩) (Founding member; Withdrew October 1, 2021)
 * Aoi Arata (蒼李あらた) (Founding member; Withdrew between October 26th and November 23, 2021)
 * Yamada Nao (山田菜緒) (Founding member; Graduated November 12, 2021)
 * Myuu (みゅう) (Joined July 22, 2021 ; Graduated November 12, 2021)