The main characters in the Fosters Home for Imaginary Friends game story are quite diverse. Mac is the human link, as his relationship with Bloo starts the whole adventure at Fosters Home. Bloo is a very energetic and impulsive imaginary friend. Madame Foster, with her warm and motherly nature, oversees the home. Eduardo, with his large and somewhat timid personality, adds to the group dynamic. And Coco, with her strange language of laying eggs with messages, is also a memorable character. They all interact and contribute to the story's development in different ways.