Bloo

Blooregard "Bloo" Q. Kazoo is one of the two main protagonists (alongside Mac) and a young imaginary friend created by Mac in Foster's Home for Imaginary Friends. He is the only character to appear on every episode of the show, including shorts.
Mac created Bloo when he was three years old, meaning that, by the start of the series, they had been creator and creation for five years. According to a trading card in the Foster's Home for Imaginary FriendsLeapster game, Mac created him when he had to give away his favorite blanket. The Mischievous Imaginary Friend who is right there to make troubles to the antagonists
== Trivia ==
* Bloo is the most well-received and disgraced character in the series.
* His nickname seems to serve as a pun on his color, "Blue", in which they sound the same.
* Bloo is the only character to appear in the entire series, including all the shorts, and is never absent.
* Bloo is apparently allergic to flowers, as seen in "Challenge of the Superfriends". As mentioned in "One False Movie", he's also allergic to tomatoes.
* Despite the fact he can be a jerk, even he cannot stand Duchess and her rudeness like everyone else in the house.