Z5-E4

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

The first line-up was announced on July 12, 2021.

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

The second line-up was announced on January 8, 2022 and debuted on January 9, 2022.

Current Members

 * Oto (音桜) (Joined January 9, 2022)
 * Shion (詩音) (Joined January 9, 2022)
 * Hachimiya Sara (八宮さら) (Joined January 9, 2022)
 * Himesaki Azumi (姫咲あずみ) (Joined January 9, 2022)
 * Yokohama Noako (横浜のあ子) (Joined January 9, 2022)

Former Members

 * Shirayuki Curana (白雪くらな) (Founding member; Withdrew between mid October and late November 2021)
 * Aiba Chiho (相羽千帆) (Founding member; Graduated November 5, 2021)
 * Watagashi Mio (綿菓子ミオ) (Founding member; Graduated November 5, 2021)
 * Ichinose Yuzuki (一ノ瀬結月) (Founding member; Withdrew before November 24, 2021)
 * Yahata Mone (矢羽田もね) (Founding member; Graduated November 7, 2021)