Vocal card (Airi) is an item that is used to purchase alternative vocals at the song store. Vocal cards are obtained through character rank milestones or by exchanging a vocal card exchange ticket or vocal card exchange ticket (MORE MORE JUMP!).
Currently, the vocal card can be exchanged for alternate vocals featuring Momoi Airi in the following songs:
- Viva Happy
- Tenshi no Clover
- Ice Drop
- Karakuri Pierrot
- Happy Halloween
- Kokoroyohou
- Parasol Cider
- Setsuna Trip