Frances McCullough is Belladonna Cove's evil witch. She lives in the Fortress of Eternal Darkness. She seems to have a huge rivalry with the good witch, Phoebe Adams, and they will fight whenever they are in the same lot.
Frances' personality points are randomized when Belladonna Cove is loaded. The following personality is only referenced in the game files. This happens with all the other high witches from Apartment Life.
According to her SimDNA in SimPE, Frances' skin was medium before she became a witch.