Brigid Tenenbaum

"For so long, Brigid Tenenbaum is selling ADAM for everyone, but then it was so illegal that the Coalition of the Red Star is so addicted to it. I can believe that if we save Elizabeth, and liberate the Little Sisters, maybe peace can be restored once more, if I have to."

--Su Ji-Hoon, Saving Elizabeth

Dr. Brigid Tenenbaum is a geneticist who discovered ADAM and helped develop it into products for commercial sale. She is also the "mother" of the Little Sisters. She created them, and eventually came to care a great deal about their safety, calling them her "little ones," acting as a mother to them, and regretting her part in helping create them. The player is able to win her allegiance by saving the Little Sisters instead of harvesting them for ADAM.