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
None currently

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)