|The following is based on Fallout: Brotherhood of Steel and has not been confirmed by canon sources.|
Dubois is the chief scientist of the Secret Vault.
A French man who believes that the research that was done in the Vault is of high priority. It is probably him who come into conflict with Blake, which led to a major explosion and started the chaos in the Vault.
Interactions with the player character
Initiate is looking for him in order to get access to the Vault's laboratory, but when he found him and they talked for a minute, Dubois is eaten by the mother of deathclaws, native to this Vault. The "Mama deathclaw" was killed and the key was taken from her belly.
Dubois appears only in Fallout: Brotherhood of Steel.