Z3-B4

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

The first line-up was announced on September 17, 2022.

Current Members

 * Aimi Yuka (藍南ゆか) (Joined December 28, 2022)
 * Kayano (かやの; ) (Joined December 28, 2022)
 * Hikari (ひかり; ) (Joined December 28, 2022)
 * Misaki Rikka (みさきりっか; ) (Joined December 28, 2022)
 * Rukino (るきの) (Joined December 28, 2022)

Former Members

 * Kanzaki Chisato (神崎千聖; ) (Founding Member)
 * Kumayuri (くまゆり; ) (Founding Member)
 * Sawada Nana (澤田なな; ) (Founding Member)
 * Aino Momo (愛乃もも; ) (Joined October 25, 2022)
 * Ichigozaki Mayu (一期崎まゆ; ) (Joined October 25, 2022)
 * Kiri (きり; ) (Joined October 25, 2022)
 * Yamada Nao (山田菜緒; ) (Joined October 25, 2022)
 * Yayoi Megu (弥生めぐ; ) (Founding Member)