Lucy (Fallout)

Lucy was one of the four psykers, along with Gideon, Wiggum, and Moore, that was kept behind a force field in the Master's Lair beneath the Cathedral. Presumably, she was one of the Master's failed experiments in trying to awaken psychic powers in humans, as Lucy was quite clearly insane. She was wearing a Psychic Nullifier and proved to be quite unintelligible when the Vault Dweller encountered her. It can be assumed that Lucy died with the destruction of the Cathedral.

According to the Fallout Bible 3 by Chris Avellone, Lucy was a telekinetic-dominant and a minor photo kinetic psyker. These powers were apparently suppressed when Lucy was fitted with a psychic nullifier.