Z5-D1

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

The first line-up was announced on July 11, 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 March 2022.

Current Members
None currently

Former Members

 * Ueda Moca (上田望夏) (Founding member; Graduated November 12, 2021)
 * Kusunoki Anzu (楠あんず) (Founding member; Graduated November 12, 2021)
 * Tsukino Mizuki (月野みずき) (Founding member; Graduated November 12, 2021)
 * Nakano Karen (中野華恋) (Founding member; Graduated November 12, 2021)
 * Fukuzawa Suzuka (福沢涼栞) (Founding member)
 * Iwakawa Mirai (岩川美礼) (Joined December 4, 2021)
 * Ruka (Joined December 4, 2021)
 * Sanai Moeka (Joined December 4, 2021)
 * Yayoi Megu (Joined December 4, 2021)
 * Kaito (カイト) (Joined March 2022)
 * Sato Suzu (佐藤寿々) (Joined March 2022)
 * Maeda Tomoka (前田桃望歌) (Joined March 2022)
 * Yukino Mahiro (雪野まひろ) (Joined March 2022)
 * Yukiho (雪穂) (Joined March 2022)