Frankie, who had spent her life in the company of Imaginary Friends, soon took on the role of taking care of pretty much everything at Foster's. She was placed in charge of cooking, cleaning the house, doing the laundry, running fund raisers, occasionally working as a handyman, driving the house residents around in the multicolored bus, and otherwise taking care of her grandmother's foster friends in most ways. Mac once referred to her as "the estate manager." Despite the fact that Frankie basically runs the house, she is still required to answer to Mr. Herriman.