Vocal card (Mizuki) 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 (25-ji, Nightcord de.).
Currently, the vocal card can be exchanged for alternate vocals featuring Akiyama Mizuki in the following songs:
- Kuyamu to Kaite Mirai
- Bitter Choco Decoration
- Villain
- Lower
- Usseewa
- Kimi no Yoru o Kure
- Bug
- Kitty