She is actually a Followers of the Apocalypse spy working for Nicole inside the Children's Cathedral. While in the guise of a believer, she is meek, submissive, and quiet. Her true nature however is bright, sharp, sarcastic, strong, and wary.
She has discovered the Children's plans to purge the wasteland of "infidels" (the impure) by systematically taking over towns, the launch point of their attacks being their hospitals, which are stockpiled with weapons and explosives. She is described by Nicole as being extremely loyal to the Followers of the Apocalypse, though it is unclear as to how long she has been working as a spy prior to the arrival of the Vault Dweller.
Destroy the Mutant leader: If she receives the password 'Red Rider' from the Vault Dweller, as provided by Nicole, she will give valuable information about the workings of the Cathedral, and unlock the door to the inner Sanctum leading to the Los Angeles Vault.