Sar and Salea were two beings who ascended into godhood. Salea's goddess name is Tletl-Meztli. She is also known as The Fire Moon, and Desirable Above All Things (Although the last one could just be what Sar calls her, because of their love.) Sar's god name is Eztli-Tenoch.
Salea longed to return to the days of old, "Before the first born of blood." This could mean that they were the first beings in existence, and created man, or the "First Born of Blood."