Crowley had assumed that Warlock was the antichrist, as did Aziraphale. For 11 years, Crowley was Warlock’s nanny, going by the name “Nanny Ashtoreth.” Crowley worked to make Warlock “evil” while Aziraphale, the gardener, worked to make him “good”, thus ending in the 11 year old being “neutral.” Crowley, despite being a demon, was a very good caretaker for the young boy and had a positive influence on his life. Warlock was very happy with Crowley as his nanny.