Before Maliwan began their attack on Promethea, Lorelei was working at a coffee shop that was occasionally visited by Rhys, the CEO of the Atlas. Once the attack began, Lorelei quickly found herself caught up in the conflict and joined Atlas in trying to fight off both Maliwan forces and members of the Children of the Vault.
Eventually, she meets up with several Vault Hunters sent by Lilith and the Crimson Raiders. Working together, they are able to establish a foothold and drive off the Maliwan troops; securing Watershed Base, Lorelei contacts Rhys and convinces him the Vault Hunters can help stop Katagawa Jr. and Maliwan's attempts at destroying Atlas.
- It is believed that Zer0 harbors a slight crush on Lorelei, due to his interactions upon meeting her for the first time.