[Rin can't help laughing again, as he swims to the flipped mermaid's side, sizing him up again. This time, he leans in enough to lean his chin against a palm, his tail pumping slowly behind him. He pokes Rei's side with a claw.]

I'm saying you came across a bored fish. Which actually works out in your favor. Because that means I might be in the position to... do something about your little problem.