SOFIA LAMB
"Utopia is not a place... but a people. It will exist the moment we are fit to occupy it."
Sofia Lamb is both an Oxford-educated psychiatrist and philosophical idealist. She was brought to Rapture to counsel the populace. Her worldviews were shaped by her experiences aiding the survivors of the nuclear blast of Hiroshima. She herself was very near the blast, but miraculously survived - only to find that everyone she had met for the past several years was dead.
The US justification for the bombing - the "greater good" - was a perversion off her own beliefs. She believes that genetic biases toward the self have doomed the surface world, and so she sought refuge in the underwater city of Rapture.
Her intent in joining Ryan's great experiment was to transform the closed society into an enlightened one through psychiatry - ultimately to abolish human suffering amongst the Utopian. Her daughter, Eleanor, was raised in isolation from other children, intended as a genius-level intellect trained to promote Lamb's philosophy. An underground religion began to form around her, born out of the city's disenfranchised, and Lamb took full advantage of it.
But Lamb's collectivist ideals conflicted directly with those of Andrew Ryan, and she mysteriously vanished during the Fall of Rapture. Later, she crossed paths with Subject Delta, murdering Eleanor's beloved bodyguard in order to retrieve her from his care.
Now that Ryan and Fontaine are gone, Lamb has returned - and it seems she has a new plan for Rapture...
