It was a strange concept, to be certain, but Killian was used to all sorts of creatures. Witches, warlocks, imps, demons, dragons, fairies, you name it. He lived in a whole cacophony of weirdness, a menagerie of strange oddities and beasties. "Aye, she's a mermaid," he chuckled roughly. "But has a piece of jewelry that lets her keep her legs on land. Otherwise it only happens during high tide." And since there was no ocean here, well.
"Friendly mermaid though, like I said. Where I'm from, they're usually not very pleasant." They had a taste for flesh. To put it lightly.