Dianne

 is the assistant of Otto Steed in 2253.

Background
Otto hired her to assist in making the water drinkable. She would never overthrow Otto, but is eager to take on bigger responsibilities.

Interactions with the player character
If you get Otto to leave, she will take control of the purifier.

Appearances
was going to appear in Van Buren, the canceled Fallout 3 by Black Isle Studios.