Blue Fire Maidens (Patreon)

Very basic name, I know. Yet feels like it fit them.

A kind of monster I would like to add to the universe.
Could be a sort of "demon", like real demon summoned from hell or living in a parrallel world.
Or perhaps just regular monster.
I imagine them living in mountains tho. In some very rocky places, chasing after living creatures to fuel their heat/head ?