Erika is the shortest of the group, reaching to Tsubomi's chest. She has round dark blue eyes and wavy, matching-colored shoulder-length hair and straightened forelocks that get wavy near the end, her bangs parted at the center with pointing ends just above her eyes.
As Cure Marine, her eyes and hair become sky blue, and her hair grows longer, splitting into two very wavy sections down to the knee. Her forelocks grow to the abdomen. On her head is a blue heart with white lining, a small blue ribbon in the back, and three white beads at the bottom, the adjacent ones smaller than the center one, as well as blue flower-shaped clip-on earrings, and she gains a dark blue choker. Her pale blue mini-dress has short puffy frilly sleeves and dark blue straps that form a slit lining.
She's very playful and very sweet!