Mercia Koster

Mercia Koster was one of the original residents of Vault 87, who died during the FEV experiments conducted in the vault.

Background
She was one of only six residents in the vault to die from something other than the experiments themselves. According to the Vault 87 medical records, she died of natural causes due to cancer type 1 categories. Despite this, her husband Daniel became convinced that her death was due to the vault's mysterious Evolutionary Experimentation Program and sought to confront those he deemed responsible.

Appearances
Mercia Koster is mentioned only in Fallout 3.