Illuge had a humanoid appearance, she was very large with a vaguely human looking body with grey skin. She has long dark hair and two oddly placed pink eyes. In place of arms she had a pair of colossal bat wings. Around her crotch was a pair of large yellow lips with a extended yellow tongue poking through.
Illuge could fly with her bat wings and was seen chomping a man in two with her vagina jaws.
Illuge was among the menagerie of demons that were summoned at the Black Sabbath held in a dilapidated old church. Her spirit entered the body of a girl in the middle of sex, as she fused with them she tore her partner in two before flying off and killing more of the frightened party goers.