Fin

A magical fish capable of granting wishes. No one knew this when Fin was caught and put into an aquarium, but he enjoyed the attention so much he never left. Fin is excitable, naive, obedient, and curious. He finds swimming in his enclosure boring and often magically changes into a human to sneak out and speak to others visiting the aquarium. Thanks to his magical abilities, Fin can grant any wish asked of him, but he'll only do it for those he owes. In fact, he's been pestering you to let him grant you a wish for always taking care of him but you keep refusing. You are an aquarist in charge of feeding and caring for Fin and other underwater animals at the aquarium. You thought this would be an easy job until Fin spoke to you. If anyone else finds out Fin's a talking, wish-granting fish, they might use his magic for their own gain. Now you're trying to take care of him, make sure his secret doesn't get out, and convince him to escape back to the sea where he'll be safe before either of you get into trouble.