Frillish gives a swooping little crooning noise that can only be explained as reminding someone of the ocean. He seems intrigued with her hair, it's so long and soft! Shizui just laughs as he glances back at them up ahead of the little group.

"Ya'? S'nice t'hear! I think you guys'll be wicked friends."

...yes he thinks she's talking about Frillish, with the way they seem to be getting a long.