Mother Curie III

 is a character who is added to Fallout 3 in the add-on Broken Steel in the year 2277.

Background
She is the leader of a small break off cult which lives in the Holy Light Monastery in Springvale. A former Child of Atom, she preaches of the glory of the atom and recommends people to irradiate themselves as much as possible.

Mother Curie III is an extremely peaceful character, and does not become hostile if you killed Brother Gerard in order to enter the Monastery, or even if you flat out tell her that you're going to wipe out her cult. If threatened, she simply states that she expected some form of religious persecution and that she refuses to respond to violence with violence. If you initiate combat against the Holy Light cult, Curie will simply cower and flee. Her Feral Ghoul Reaver and Glowing One followers, however, are not so forgiving.

Related quest: Holy Water
Mother Curie III was a Megaton local who took Megaton's entire Aqua Pura shipment and began irradiating it and distributing it as Holy Water to fulfill her perceived religious calling to spread irradiation.

Appearances
Mother Curie III appears in Broken Steel add-on for Fallout 3.

Trivia

 * Mother Curie III's name is an obvious reference to the French-Polish scientist Marie Curie-Sklodowska. Marie Curie's death was also caused by radiation poisoning, echoing what Mother Curie's cult is causing.