AlienLover
Keelah se'lai
Honestly, as I myself am not playing a mermaid character, I've chosen to let the first player kind of set the pace. There is so much in myths and lore towards mermaids and what they can do that I'll leave it up to the players to decide what is reasonable.
I would add it to the character sheet, though. If not, it shouldn't take us too long to figure it out via your posts unless you're very good at hiding it. But most people monologue, at least I know my characters do, and I'm sure as a mermaid you (for example) would have thoughts of missing home or loving the water more than the average human.
I'm very open to suggestions, though. And if you're confused at all about whether I'd deem something OP, you could message me first and ask.
Sounds good! Just thought I should ask first before I did anything. I had some ideas so I'll message you now and make sure it's not too outlandish or overpowered or anything