Aosoth – Dark female force in the pantheon of the Order of the Nine Angels. Works of passion and death. The name should be vibrated.
Hela – (Teutonic) goddess of death, daughter of Loki. (not a demon, but hela would be hella cool)
this just sounds cool: Ala - Slavic. A class of female demons of bad weather whose main occupation is leading hail-producing thunderclouds in the direction of fields, vineyards and orchards. Extremely voracious, Ala particularly like to eat children, though their gluttony is not limited to Earth - they may sometimes try to devour the sun or the moon, causing eclipses. When people encounter an ala, their mental and physical health and life are in peril; however, favor can be gained by approaching the ala with respect and trust. Alas can make their favorites wealthy and even save their lives in times of trouble.
Ammut - Egyptian. A female demon with the body part lion, hippopotamus and crocodile. Called Devourer of the Dead, Ammit lived near the scales of justice in Egyptian underworld anddevoured the hearts of those judged to be not pure.
Lady Midday/ Pscipolnitsa/Poludnitsa - Slavic Christian. A female demon who assails folk working at noon causing heatstroke, aches in the neck and sometimes madness. She takes the form of a whirling dust cloud and carries a scythe. She will stop people in the field to ask them difficult questions or engage them in conversation. If anyone fails to answer a question or tries to change the subject, she will cut off their head or strike them with illness. She may appear as an old hag, a beautiful woman, or a 12-year-old girl. She is only seen on the hottest part of the day and is a personification of sun-stroke.