Ymir was a tall, slender young woman with short, shaggy black hair parted down the middle. She had deeply intimidating gray eyes and freckles on her cheeks. Ymir's hair was usually kept in a low ponytail with a white tie.

During her military service, she wore the uniform of her faction with a dark v-neck underneath. When Ymir was revered as a goddess, she wore a pale halter dress with a belt and her hair down. During her final days on Paradis Island and leading up to her death, Ymir wore dark p