Mac is A bright and somewhat shy 8-year-old boy who visits Foster's. He almost always seems to know what to do when there is a problem. Mac becomes extremely hyperactive to the point of a rabid mania if he eats sugar; once in this state, he will often become obsessed with seeking any other source (and will also sometimes run around naked letting things hang out or in his underwear). Mac also has a platonic relationship with Frankie. He is voiced by Sean Marquette.
Allies: Bloo, Eduardo, Wilt, Coco, Frankie, Madame Foster, Mr. Herriman, Goo Enemies: Terrence, Duchess, Bendy Likes: Bloo, Frankie, helping people with problems Dislikes: Terrence and his bullying, his friends in danger, Bloo's get rich quick schemes