In Aztec mythology, a Tzitzimitl is a deity associated with stars. They were depicted as skeletal female figures wearing skirts often with skull and crossbone designs.
The Tzitzimimitl were associated with the stars and especially the stars that can be seen around the sun during a solar eclipse. This was interpreted as the Tzitzimimitl attacking the sun.
The Tzitzimimitl had a double role in Aztec religion: they were protectresses of the feminine and proprietresses of mankind. But they were also powerful and dangerous, especially in periods of cosmic instability.