Blooregard Q. Kazoo, or simply Bloo, is one of the two main protagonists and a young Imaginary Friend or kid created by Mac in Foster's Home for Imaginary Friends. According to a trading card in the Foster's Home for Imaginary Friends Leapster game - Mac made him when he had to give away his favorite blanket. This blue ghost-like creature seems crazy after everything going on with this world in our fanart Foster's Blooregard Bloo Crazy Sticker.