She and her husband are two of the residents in Vault 101 who the player will encounter during their escape from Vault 101. If the player does not kill the security guards in time, she is likely to be killed by Officer O'Brian and Officer Richards when she tries to follow Tom on his escape. There is no Karma bonus for saving either Tom or Mary, nor is there a Karma loss for letting them perish.
The Holdens will flee if the character gets shot at before Tom attempts his escape. Extra Karmic players may wish to utilize this to save the Holdens. Since the guards will rarely leave their post and chase the player, the vault can be broken free from with minimal bloodshed.
Escape!: Mary and her husband, Tom, can be heard talking about escaping the vault in the main atrium. Following their brief chat, she and her husband run, trying to escape, but to no avail.
Effects of player actions
Waiting to watch Tom get shot will also cause Mary to run towards the guards shortly after, getting killed as well.
