Z3-B1

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

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

Current Members

 * Sorane Kokomi (空音ここみ; ) (Founding Member)
 * Hanamiya Ayaka (花宮あやか; ) (Joined September 2022)
 * Hoshino Himari (星乃ひまり; ) (Joined September 2022)
 * Minazuki Reine (水無月黎音; ) (Joined September 2022)
 * Yoshida Momo (吉田桃; ) (Founding Member)

Former Members

 * Aino Momo (愛乃もも) (Founding Member)
 * Kanzaki Chisato (神崎千聖) (Founding Member)
 * Momoa Mahiro (桃愛まひろ) (Founding Member)