Übel is a young human mage of similar height to Fern. She has dark green hair that is sectioned into three groups of bangs and tied into a thick side ponytail. Her eyes are noticeably droopy with abundant eyelashes.

Übel's main attire consists of a tight-fitting black top that frames her chest and is held up by four straps—three on her front and one on her back—that attach to a ring on a choker. She wears a thick belt that is clasped at the front and has two loops attached on each side.