Enyo is Alithea's twin sister.
During the trip from Earth to Acheron, 10 Titanborn were created. They remained in cryosleep. Venerated through tales and lore and occasionally labeled as "Earthborn." Enyo was the only surviving non-Titanborn, yet had a similar bloodline as Alithea. This allowed Enyo to surpass the traditional age of most humans, barely aging over the decades of orbital colonization. It became quite clear that whatever happened to the 10 Titanborn through cryosleep created a new augmented biology. Enyo was part of the initial Cepheus corporation, eventually coining the term "Titan Born". With this knowledge spreading throughout the populace, she was given a highly trained military guard called the "Banshees".