Trell is a Artificial Intelligence. That you can Receive from Orzu.
She will active once you met with the robotic scientist in the story mission.
Throughout the story, Trell will task you with retrieving several reliquary pieces to help her regain her memory. She will reward you with permanent ship upgrades. You must carefully choose because you can not change this upgrade later.
The first set of upgrades she gives is efficiency boosting for reflector or booster.
The second set of upgrades are between Engine or Shields.