O. Olivette

Dr. Olivette was the first overseer of Vault 81 and the only member of the "residential side" to know of the Vault's true purpose.

Background
When Vault 81 was built, it was designed with two parts: the residential side where the vault dwellers would live and the secret side, where scientists would study in hopes of creating a cure for all of humanity's illnesses. Doctor O. Olivette was picked by Vault-Tec from their candidate list after their prime choice, Duncan, fell ill.

Dr Olivette was skeptical of Vault-Tec's goal and possible use of human experimentation and planned to blow the whistle if it was unethical, however when she received her full briefing she found out the true unethical nature of the experiment and that Vault-Tec had major backers in the federal government and blowing the whistle will do nothing. Dr Olivette was determined to not let the residents of the vault be used as guinea pigs and tried to think of a plan. On the morning of October 23, Dr Olivette received the "call" to start the notification of staff and residents, but sabotaged the call list so the science staff wouldn't be notified and show report in. Her plan mostly worked, however three of the science staff turned up with two living nearby, and coming over with the general population, and the third one showing up wanting to see when the next drill was.

Dr Olivette was the only person on the residential side aware of the existence of the secret Vault 81, which Olivette communicated with through terminal. As the three scientists worked to create their cure, Olivette watched over all of their data and personally had to approve the scientists moving onto to Phase II, animal testing, and Phase III, human testing on unknowing participants.

Before Phase III of testing began, Olivette disabled the delivery systems allowing the scientists to infect the vault dwellers as well as sealing all access to the secret vault, leaving the three scientists to die. She kept the vault's true purpose ,and the existence of the secret vault, a closely guarded secret so no one would find out what she did.

Appearances
O. Olivette is only mentioned in Fallout 4.