Oh, this is a really nice concept for a skin if i have to be fair.
though this may sound generic but i would call her.
Seashell Sona.

Could call her Siren Sona

Oh~ I like the sound of Siren Sona.

Problem though. Saying Siren, one would assume she is singing, but since Sona has no voice... Plus, there's already a Siren Cass.

Nermie said:
Problem though. Saying Siren, one would assume she is singing, but since Sona has no voice... Plus, there's already a Siren Cass.

That's true, the only thing else that comes to mind is the Little Mermaid when she lost her voice

Krugger said:
That's true, the only thing else that comes to mind is the Little Mermaid when she lost her voice

How about the Ocean Princess skin? It just came to me.

Under the sea.