This is a list of characters from the Cartoon Network animated television series Foster's Home for Imaginary Friends.
Mac (voiced by Sean Marquette) is Bloo's creator, a bright, shy, and creative eight-year-old boy who visits Foster's every day.[1] Mac is often the voice of reason among his friends when they are making decisions. However, his extremely good nature tends to make him somewhat naive. He is very attached to Bloo, and it is shown that his biggest fear is never seeing him again because Bloo is what keeps him happy and cheerful and vice versa. Mac becomes hyperactive to the point of a rabid mania when he eats even a drop of sugar. Once in this state, he becomes impossible to control, will often become obsessed with seeking any other source of sugar, and may completely disrobe to run in the streets of the city.
He, alongside Bloo, made a cameo appearance in The Powerpuff Girls series finale, "The Powerpuff Girls Rule!".
Mac is Terrence's younger brother.
Bloo (voiced by Keith Ferguson) is Mac's best friend and imaginary friend. Bloo is an anthropomorphic blue dome cylinder who is often very immature, happy-go-lucky, self-centered, impulsive, and egotistical, as well as having a knack for getting into trouble and prone for doing kid's and children's antics. Despite all this, he still has a good heart and apologizes for his jealousy. Bloo loves toys, especially paddle-balls – even though he cannot make the ball hit the paddle. His full name is Blooregard Q. Kazoo.
Wilt (voiced by Phil LaMarr) is a very tall, friendly, incredibly nice imaginary friend with only a right arm and a crooked left eye-stalk. However, in "Good Wilt Hunting," it is discovered that he was not always this way; he was injured during a basketball game, leaving his left eye crushed and his left arm injured. Wilt exhibits consummate good sportsmanship, applied to every part of his life. He is considered to be the nicest person at Foster's and is known for being excessively polite and apologetic, a nature often taken advantage of by the other imaginary friends and even some of the Foster's staff.
Wilt has a big heart, is cool and collected by nature, and, only on very rare occasions does he show any anger at all (at which point he will express his anger in overdramatic hysterics). According to the episode "Room with a Feud," among himself and his roommates Coco and Eduardo, he has been in the house for the longest time.
He is named after basketball legend Wilt Chamberlain.
Eduardo (voiced by Tom Kenny) is a big, hairy, purple, Spanish-speaking imaginary friend who resembles a mixture of a minotaur and one of the beasts from Maurice Sendak's storybook Where the Wild Things Are, with horns, a snout, a pointy demon-like tail, and large teeth. Despite his large and imposing size, overwhelming strength, and menacing appearance, Eduardo is usually docile, timid, somewhat overly sensitive, crying at minor negative occurrences and being scared of almost everything, most of all spiders. However, he can be ferocious if angered or in the circumstance that danger befalls one or more of his friends.
Eduardo has a fondness for potatoes, dogs, and his cuddly toys. He once had a puppy he named Chuy ("Chewie"), who turned out to be an imaginary dog with the ability to speak and bite with ferocious playfulness. He also likes the preschool show Exploring Lauren. His creator Nina Valerosa, now a police officer for the city, created him to protect her in a rough neighborhood.
Coco (voiced by Candi Milo) is a chicken-like imaginary friend with a palm tree shaped head with hair mimicking its fronds, a crooked red beak, and an airplane-shaped body despite which she can neither fly long distances or hover for very long. Coco can only say her name at various speeds and different emphases. A talent unique to her is her ability to lay colorful plastic eggs containing a plethora of objects of her choosing. Mac, Bloo, Eduardo, Frankie, Wilt, and others usually understand her when she speaks and often translate for her to subtly break the fourth wall.
Despite her appearance and quirky behavior, she can demonstrate great intelligence, principle, ethics, discipline (in getting various jobs), and kindness. No one knows who her creator is as she was found on a South Pacific island by two scientists named Adam and Douglas.
Frances "Frankie" Foster (voiced by Grey DeLisle) is Madame Foster's redheaded 22-year-old[2] granddaughter, addressed as "Miss Frances" by Mr. Herriman. Her parents are never seen in the series. Frankie is the primary caregiver at Foster's, keeping up the house's cooking and cleaning, and helps keep everything in order. In spite of Mr. Herriman's fussiness and fixation with rules and cleanliness, she is usually very friendly, outgoing, and laidback.
Frankie is friends with most of the imaginary friends at Foster's (particularly Wilt, Eduardo, Coco, and Bloo) and can be described as a protective big sister to them; but sometimes, she is unsuccessful in her attempts to remain professional and gets loudly annoyed at Bloo, Mac, Cheese, Madame Foster, Mr. Herriman, and the other house residents regularly.
According to her driver's license in "Bus the Two of Us," she was born on July 25, 1984 (making her 40 years old at the end of 2024).
Mr. H. Herriman (voiced by Tom Kane) is a gray and white, large, elderly, anthropomorphic, lop-eared and rabbit-like imaginary friend with an English accent imagined by Madame Foster in fact quite similarly to Bruce Wayne's butler, Alfred Pennyworth. He wears a tailcoat, white gloves, a top hat, and a monocle, being an embodiment of the Edwardian era. He is in charge of the house and is extremely strict about house rules, observably putting the rules before common sense and common ethics, as seen in "" when he sticks to the rule written on the chained up toy box of never letting the imaginary friend who is trapped in there out despite what would happen to him if he did not.
He is often found punishing house residents (invariably, usually Bloo) for various rule violations. It was revealed in "Busted" that the reason Mr. Herriman is so hard on Bloo is because he feels that, given that he is allowed to stay at Foster's even though he still has an owner, he has already broken one of the main house rules. He is extremely fond of his creator Madame Foster, harboring great respect and loyalty to her, even at her most prominent levels of unabashed pep and energy. In Madame Foster's youth, Herriman created a lullaby named "Funny Bunny" which, today, causes him great embarrassment.
He has a fear of dogs (due to the fact that dogs are the natural predators of rabbits) and is easily scared out of his wits whenever he comes across one. He also has a rabbit's stereotypical obsession with carrots and will do anything to have them, as demonstrated in "Crime After Crime"; in that episode, he was arrested for harboring a stolen "100 carrots" ... of diamonds.
Madame F. Foster (voiced by Candi Milo) is the founder of Foster's and grandmother of Frankie. She's an old person but has childlike boundless energy and enjoys herself to the fullest. She loves wild house parties. Her imaginary friend is Mr. Herriman, whom she imagined when she was a child and never gave up, and is the only one who can control him; like Mac, she never intended to give her imaginary friend up, and like Bloo, Madame Foster occasionally becomes hyperactive and mischievous with a disdain for the rules. However, there are times she is shown to be the wisdom of the house.