Overview
The series is set in a world where childhood imaginary friends co-exist with humans and is set in an orphanage designed for outgrown or abandoned imaginary friends in which they may reside until adoption by another child. In the Foster's universe, imaginary friends take physical form and become real as soon as children think them up. Once the children outgrow them, the friends move to Foster's Home for Imaginary Friends, where they stay until other children come to adopt them. The home is run by the elderly Madame Foster, its founder; her imaginary friend Mr. Herriman, the business manager; and her granddaughter Frankie, who handles day-to-day operations.
After being forced to abandon his imaginary friend Bloo, a young boy named Mac bargains with the caretakers and employees working at Foster's Home for Imaginary Friends; that they guard Bloo from adoption so long as Mac continues to visit the center daily. The series focuses on the escapades experienced by the mischievous Bloo, Mac, and the array of eccentric, colorful characters inhabiting Foster's Home, or the obstacles with which they may be challenged.
Read more about this topic: Secondary Characters In Foster's Home For Imaginary Friends