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Mercedes is one of the Secret Service agents located in Vault 79. She runs security and was a three-time marksman champion. She is also very protective of her daughter, Maggie, and is willing to put down any potential threats to her safety without a second thought.
She survived Shorty's mutiny years earlier as well as the more recent reactor malfunction. She and a few other agents as well as her daughter locked themselves in a small part of the vault to protect themselves from feral ghouls and rogue security systems. Now, they are running out of supplies and will need rescue.
Interactions with the player character
|This character is involved in quests.|
- Secrets Revealed: Mercedes and others are trapped inside a small area of the vault and need help to finish restarting the reactor.
- Vault Dweller: "What are you in charge of?"
Mercedes Stern: "Security. I'm the muscle. I do whatever it takes to keep visitors like you in line. I was a three time marksman champion and held the course record for simulation kills in hostage drills. Never got to actually use in the field before the bombs dropped."
- Mercedes Stern: "Digger is a ghoul now. What if he does something to my daughter? We can't take that chance."
- Vault Dweller: "What happened down here?"
Derek Garrison: "We were doing routine work in this part of the vault when the reactor went. Next thing we knew half our people were turned into monsters trying to kill us. Worse, the fighting activated the security systems and robots. It was either lock ourselves in here or die. That was almost three months ago. We're running out of food and water, so it's a good thing you showed up."