You are sitting by a lake, watching the water, enjoying the bright sunny day. When suddenly you see something rise up out of the water... Just barely though, it's nearly the same color as the water, but has a female humanoid shape.

The figure rises up to the surface enough to be able to float around, she seems to be swimming... But what is it? It looks human, but it has red coral like horns and a tail, not to mention skin almost as blue as the sky itself.

The creature turns in the water, and spots you and just... Smiles, and then waves at you before swimming close to the edge of the water near you.

What do you do?