Z5-B3

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

The first line-up was announced on July 9, 2021.

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

The second line-up was announced on December 4, 2021.

The third line-up was announced in July 2022.

Current Members

 * Amane Hana (天音巴七; ) (Joined March 6, 2023)
 * Amano Kotoha (天野琴巴; ) (Joined March 6, 2023)
 * Kurusu Yuuka (来栖優香; ) (Joined March 6, 2023)
 * Tsugunaga Uta (嗣永うた) (Joined March 6, 2023)

Former Members

 * Ito Mikana (伊藤望叶) (Founding member; Withdrew between September and November 2021)
 * Shirosaki Matsuri (白崎まつり) (Founding member; Graduated November 12, 2021)
 * Sakuma Nana (佐久間七菜) (Founding member; Graduated November 12, 2021)
 * Noichigo Mikuru (野苺みくる) (Founding member; Graduated November 12, 2021)
 * Hanai Rurina (花井瑠莉奈) (Founding member; Graduated November 12, 2021)
 * Hayami Suzuka (Joined December 4, 2021)
 * Himemiya (Joined December 4, 2021)
 * Ide Ryoko (Joined December 4, 2021)
 * Kozakura Purple (Joined December 4, 2021)
 * Shio Yukina (Joined December 4, 2021)
 * Wendy (Joined July 2022)
 * Sato Nao (佐藤なお) (Joined July 14, 2022)
 * Fukazawa Karin (深澤架琳) (Joined July 14, 2022)
 * Pochiko (ぽちコ) (Joined July 2022)
 * Umehara Shizuno (梅原しづ乃) (Joined July 14, 2022)
 * Kira Alice (吉良ありす) (Joined August 14, 2022)
 * Kokeshi (こけし) (Joined August 14, 2022)
 * Hayasaka Kaho (早坂かほ) (Joined August 14, 2022)
 * Umehara Shizuno (梅原しづ乃) (Joined September 17, 2022)
 * Enomoto Hatsune (榎本初恋; ) (Joined September 17, 2022)
 * Fuka (颯奏; ) (Joined September 17, 2022)
 * Yozuki Ayu (夜月あゆ; ) (Joined September 17, 2022)
 * LaLa (Joined September 17, 2022)
 * Enomoto Aoi (榎本葵) (Joined October 25, 2022, Graduated November 29, 2022)
 * Aise Uru (逢瀬愛瑠) (Joined October 25, 2022, Graduated November 29, 2022)
 * Anzu (Joined November 29, 2022, Graduated December 28, 2022)
 * Ichinose Nonoka (一ノ瀬 ののか; ) (Joined October 25 or November 29, 2022)
 * Gifuto (ギフト) (Joined November 29, 2022)
 * Shiroma Aoi (白間葵衣) (Joined November 29, 2022)
 * Yugi Hirune (柚木 ひるね) (Joined November 29, 2022)
 * Tahata Moeno (田畑萌音) (Joined December 28, 2022)
 * Tokinaga Yukino (時永ゆきの) (Joined December 28, 2022)
 * Watanabe Runa (渡辺瑠奈) (Joined December 28, 2022)
 * Okada Nana (岡田なな) (Joined December 28, 2022)
 * Mao (まお; ) (Joined January 14, 2023)
 * SoLA (Joined January 14, 2023)
 * Otonashi Shiro (音無シロ) (Joined December 28, 2022)
 * Oda Eri (織田えり; ) (Joined January 14, 2023)
 * Hoshiai Rine (星合里音; ) (Joined January 14, 2023)