Serina: You have the ability to control monsters. So, can you like, understand them?

Emi: Where is this coming from?

Serena: Well, you heard about "Monster Cave", right? Could you maybe fix that?

Emi: Monster,,, Cavet? What are you talking about?

Serena: It's a cave in the U.S. that often has strange monsters! It makes it hard to deal with!