Barbara Minerva has the appearance of an humanoid cheetah, having feline facial features. She is a tall and imposing. Her ears are rounded, she has slit pupils, yellowish eyes, and a muscular physique. Fur covers her entirely. She has no hair in this form.

Her fur is a tawny, pale buff color, with underparts that are paler and whiter. Black spots are spread out in her body. A black tear mark runs from the inner corner of each eye down to the mouth. She has claws instead of nails.