Rocma has raceless white skin, hair, and black eyes with white pupils. Her hair is white and tied into braids held with pompoms. She wears a fluffy white hat with a beige ribbon over her notched left ear. She also wears a fuzzy white scarf, a beige coat-like dress with fur at the hem and cuffs, and beige and white boots with white ribbons accented with pompoms. Rocma also has a large chest. She is Mafuyu's foster parent and has a deep dislike for Idate. Rocma is 165 centimeters tall.