Mermaid Fin is friendly and bright. Though she's not the fastest swimmer, she's a quick thinker who's always happy to help her friends figure out a solution to a problem. Mermaid Fin sleeps in her very own soft and cozy sleeping pod. Her name is based off fins, appendages of various sea creatures.
Fin is pale pink with hot pink cheeks. Her hair is split into light purple and violet, pulled into a curled bun on the top of her head held with a pearl chain and orange ornament. Her left arm is pink and hot pink-striped, while her other arm is fuchsia. She wears a light orange top lined by a row of tiny white pearls and a bright orange mermaid tail with one hot pink fin and one light purple fin. Around her waist is a tulle hot pink tutu skirt.