Wait, I thought she can't talk at all when she's in her mermaid form? (￣∇￣")

Omg i didnt see that oop (⊙…⊙ )

She can in both forms, however she cant mention anything related to the curse. This includes her mother who knows about the curse, and Noro who she believes to know about her condition. I hope this clears up your doubts. This is what I got from reading the text.

*She can talk in both forms.