I would be Oshawott! For starters I love mustelids (otters are aquatic mustelids) - strong love for eating fish and any other meats, always curious, I like to play a lot when I'm not sleeping, very quiet, I sleep a lot, I don't mind the water, I'm very nocturnal too (I'm more alert at nights than during the day) - at times I do feel like I'm mustelid trapped in a human body.
almost forgot - Dewott is my 6th favorite Pokemon in the world