Carmilla is a tall and slender humanoid demoness with an hourglass figure, light grey skin, and very long, thick white hair with a dark grey streak in her bangs. Her hair is usually kept into a pair of long and large beehive-like horns by thin, ballerina-like black ribbons. Her mouth has black lips and noticeable small fangs inside, and she has a marking colored in a darker shade of her grey skin tone resembling a mask. Her eyes have white irises, bright red sclera and black slit pupils.