WAgg

 is the official trainee unit of WACK. The purpose of the unit is to train young girls to eventually debut in a WACK group.

Rather than having original songs, WAgg instead perform covers of tracks by other WACK artists.

Current Members

 * Utauuta
 * A Anzupia
 * Love
 * Sayaito
 * Nayu
 * Ainastar
 * Waki Waki ​​Wakki

Former Members

 * Naruhaworld
 * Uruu Ru
 * Hanaemonster
 * Kira May
 * Marin Ba