Cecily

Cecily was a witch who worked as an Obliviator for the Magical Congress of the United States of America in the 1920s.

In 1926, Cecily was dating fellow MACUSA employee Sam, who worked as an Obliviator, and was already romantically tied to Ruby. Queenie Goldstein, a Legilimens, uncovered Sam's infidelity by reading his mind. She convinced him not to wipe the memory of Jacob Kowalski by threatening to expose his relationship with Cecily to Ruby.