Z4-D2

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

The first line-up was announced on November 20, 2021 as additional promotions to Z4 but wouldn't be participating in the unveiling live on the 21st.

Current Members

 * Hanasaki Lisa (華咲りさ) (Founding member)
 * Kusaka Hiiro (日下緋彩) (Founding member)
 * Soli (소리) (Founding member)