Vella Act 2
This trophy is missable. Once Vella has unlocked the door to the Control Room, she must create a bomb and plot a course for the ship to escape. During this time, she can go back to Marek's Hideout through the vent in the Trophy Room. In the Hideout is an electrical panel. If Vella touches this panel, it falls off and the window in the door clears. Vella can now talk to the Maidens. If you exhaust their conversation options, you will eventually be given the chance to tell the Maidens that Mog Chothra was a scam. This is the option that provides the dialogue that is needed to unlock the trophy.