Marine is a short Mobian raccoon with orange fur, a white muzzle, a small black nose, and sky blue eyes with one long eyelash on each one. She has brown triangular ears with cream canals on top of her head, brown rings around her rounded tail, and brown and cream-stripe markings around her eyes. On her head, she has two upturned pigtails with brown tips that are held together by yellow scrunchies.

For attire, she wears a lime green tube top with a white trim, black capri leggings, tan gloves, white socks, and lime green and orange shoes with gray soles.

Marine is cheerful, carefree and energetic, but also stubborn at times, brash and overconfident. She is extremely scatterbrained, always following her first intuition, and so often acts before she thinks. Marine loves to talk and does not know when to stop chattering, but she never listens to others and hardly does anything she is told if not in the mood. She is likewise relatively bossy and attention-seeking. She also has a habit of exaggerating and embellishing, often to make herself seem more important or talented; as such, she tends to strike others as annoying. Nevertheless, she generally means well and cares deeply for her friends, and can be counted upon when needed. She is also (surprisingly) a neat freak.