|The following is based on information from Fallout: Brotherhood of Steel.|
While running away after the second battle with Attis, the Initiate will stumble upon Patty, the Secret Vault security officer. She followed the Initiate to initiate Vault emergency decontamination procedure but was captured by a mutant blob and now she's being eaten alive.
Patty asks the Initiate to put her out of her misery. Doing so is considered a good option.