Vocal card (Luka) 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.
Currently, the vocal card can be exchanged for alternate vocals featuring Megurine Luka in the following songs:
- Teo
- Inochi ni Kirawarete iru.
- Bitter Choco Decoration
- Chikyuu Saigo no Kokuhaku o
- Nikkori^^ Chousatai no Theme
- Ghost Rule
- Peaky Peaky
- Ame to Petra
- Parasol Cider