Vault 11 survivor

The Vault 11 survivor is a mentioned only character

Background
After the conclusion of the Vault 11 conflict, only five people were left alive. The survivors refused to continue the experiment, expecting to be killed. Instead, the vault door opened, and they were informed that they had done the "American" thing, not sacrificing their peers. Traumatized by this information, they either killed themselves or were killed by one another, with the exception of one individual. A gun dropped to the ground can be heard, followed by the last individual sighing deeply and walking away.