Z5-A3

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

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

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

The second line-up was announced on January 9, 2022 and debuted on January 15, 2022.

The third line-up was announced in March 2022.

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

Current Members

 * Sakura Aya (桜あや) (Joined May 24, 2023)
 * Takayama Aika (高山愛彩) (Joined May 24, 2023)
 * Nishino Haruka (西野遥香) (Joined May 24, 2023)
 * Yotsuba Yonme (四葉よんめ) (Joined May 24, 2023)
 * RINO (Joined May 24, 2023)

Former Members

 * Shinkawa Mayuka (新川まゆか) (Founding member; withdrew August 30, 2021 )
 * Hirota Marina (廣田まりな) (Founding member; Withdrew October 9, 2021)
 * Toda Roa (兎田髏亞) (Founding member; Withdrew between mid October and November 2021)
 * Ichinose Rio (一ノ瀬りお) (Founding member; Graduated November 12, 2021)
 * Shichinohe Asami (七戸あさみ) (Founding member; Graduated November 12, 2021)
 * Tsuno Hirona (津野紘菜) (Joined September 1, 2021 ; Graduated November 12, 2021)
 * Aizome Kyoka (愛染杏華) (Joined January 15, 2022)
 * Ameyama Miku (飴山みく) (Joined January 15, 2022)
 * Kisaki Riho (希咲りほ) (Joined January 15, 2022)
 * Shirakuma Juna (白熊樹菜) (Joined January 15, 2022)
 * Chako (チャコ) (Joined January 15, 2022)
 * Aoi Rui (蒼井ルイ) (Joined March 2022)
 * Nagisa (Joined March 2022)
 * Mizuhata Marina (水畑まりな) (Joined March 2022)
 * Minazuki Reine (水無月黎音) (Joined March 2022)
 * Runaha Emiri (月羽笑里) (Joined March 2022)
 * Ichinose Nonoka (一ノ瀬ののか) (Joined March or April 2022)
 * Usami Momo (うさみもも) (Joined March or April 2022)
 * Nagisa (なぎさ) (Joined March or April 2022)
 * Mochinose Sae (望乃珹さえ) (Joined March or April 2022)
 * Aoi Rui (蒼井ルイ) (Joined March or April 2022)
 * Ayase Mayo (絢瀬まよ) (Joined July 14, 2022)
 * Momoi Kurara (桃井くらら) (Joined July 14, 2022)
 * Enomoto Hatsune (榎本初恋) (Joined July 14, 2022)
 * Saito Madoka (斎藤まどか) (Joined August 14, 2022)
 * Sakaguchi Kotone (坂口琴音) (Joined August 14, 2022)
 * Yuyu (ゆゆ) (Joined July 14, 2022)
 * Yozuki Ayu (夜月あゆ) (Joined July 14, 2022)
 * Aito Sakura (愛桃さくら; ) (Joined September 17, 2022)
 * Kokeshi (こけし; ) (Joined September 17, 2022)
 * Suzuki Motoko (鈴木素子; ) (Joined September 17, 2022)
 * Hanane Arisa (花音ありさ; ) (Joined September 17, 2022)
 * Hayasaka Kaho (早坂かほ; ) (Joined September 17, 2022)
 * Natsuno Suzuka (夏乃すずか) (Joined November 29, 2022, Graduated December 28, 2022)
 * Oda Eri (織田えり) (Joined November 29, 2022, Graduated December 28, 2022)
 * Enomoto Aoi (榎本葵) (Joined November 29, 2022)
 * Kadota Nao (かどたなお) (Joined November 29, 2022)
 * Sui (穂) (Joined November 29, 2022)
 * Okada Reiko (岡田怜子) (Joined December 28, 2022)
 * Hanafu Sayuri (花房優里) (Joined December 28, 2022)
 * SoLA (Joined December 28, 2022)
 * Minori Kuu (三乗くう) (Joined December 28, 2022)
 * Tokinaga Yukino (時永ゆきの) (Joined January 14, 2023)
 * Yamada (ヤマダ) (Joined December 28, 2022)
 * Tahata Moeno (田畑萌音; ) (Joined January 14, 2023)
 * Anzu (Joined January 14, 2023)
 * Watanabe Runa (渡辺瑠菜; ) (Joined January 14, 2023)
 * Otonashi Shiro (音無シロ) (Joined October 25, 2022, Re-Joined March 6, 2023)
 * On Reika (温翎禾) (Joined March 6, 2023)
 * Tokinaga Yukino (時永ゆきの) (Joined January 14, 2023)
 * Jinguji Naasa (神宮司菜朝; ) (Joined January 14, 2023)
 * Nishino Rina (西野里菜) (Joined March 6, 2023)