Bloo

Bloo is the main antagonist of the story. He is from Foster's Home for Imaginary Friends.

In Beginning
Bloo first appears on page 9, when Carrie, Sydni, Hatenko, Don Patch, and Ickis leave the hut to go look for the first shard. Bloo is crying under the table, complaining about how "no one remembered him." This motivation is actually a nod to the cancellation of the Foster's. after the show went, nobody remembered the poor character.