Tzitzimime

Tzitzimime are monstrous mexica deity (Aztecs) associated with stars. They were depicted as skeletal female figures who wants the humanity destruction. In Postconquest descriptions they are often described as "demons" or "devils".
They always try to destroy the Sun in the dawn or sunset and those are more powerful on eclipse. That´s one of several reasons why the aztecs needed blood offerings to the Gods.
To preserve the Sun.