Katherine Stone

 was the former Overseer of Vault 11.

Background
During her time as Overseer, she instituted Overseer Order 745, stating that any Overseer from then on out will no longer be chosen by election but rather by random from a computer. This decision most likely brought the downfall of Vault 11. Prior to her election, members of the Justice Bloc, a powerful voting group, threatened to nominate her husband, Nathan Stone, for Overseer unless she performed sexual favors for them. She complied, but the Bloc still nominated her husband. She then took it upon herself to kill as many members of the Justice block as she could, almost guaranteeing her election. Riots broke out after she issued Overseer Order 745, which eventually led to the fall of Vault 11.

Appearances
is only mentioned in Fallout: New Vegas.