List of Foster's Home for Imaginary Friends characters

"Goo Goo Ga Ga" redirects here. For the sound, see Babbling.

This is a list of characters from the Cartoon Network animated television series Foster's Home for Imaginary Friends.

Main characters

Mac

Mac (voiced by Sean Marquette) is Bloo's creator, a bright, shy, and creative eight-year-old boy who visits Foster's every day. 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

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

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

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

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.

Frankie Foster

Frances "Frankie" Foster (voiced by Grey DeLisle) is Madame Foster's redheaded 22-year-old 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. Herriman

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 "Destination: Imagination" 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 Foster

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.

Recurring characters

• Duchess (voiced by Grey DeLisle) - A two-dimensional banshee-like high-maintenance pedigree imaginary friend who is pompous, ugly, rude, arrogant, selfish and lazy, so lazy that she orders Frankie to open her eyelids for her first thing in the morning. She considers herself superior to all the other imaginary friends, is extremely negative towards everyone, and never says anything nice. Whenever Duchess turns on the spot, her entire body pivots like a sheet of paper being flipped, revealing that she is only two-dimensional both mentally and physically. Her full name is "Her Royal Duchess Diamond Persnickety the First, Last, and Only," which she demands she be introduced as to potential adopters. She speaks with a German accent. Details about Duchess's life before moving to Foster's or who created her remain a mystery since neither Duchess nor her creator were even shown at the reunion in "Good Wilt Hunting."
• Mac's mother (voiced by Grey DeLisle) - The mother of Terrence and Mac who is rarely shown but often mentioned. She tells her youngest son Mac to give up Bloo because she gave up her imaginary friend at his age. She seems completely unaware that Mac visits Bloo at Foster's everyday.
• Goo Goo Ga Ga (voiced by Grey DeLisle) – A hyperactive, happy-go-lucky, overly imaginative and talkative African-American girl who first appeared in "Go Goo Go". Her parents allowed her to name herself when she was a baby resulting in the full name "Goo Goo Ga Ga." Goo enjoys playing games such as Checkers and Truth or Dare, but she does not know how to play and Mac is the only one who notices. In her first appearance she constantly created imaginary friends because she had no real friends because of her eccentricity. She finally stopped making new friends and undoes them after Mac told her to get to know the ones she had made already. However, she has still created a few by mistake or to help on rare occasions. She is also shown to be the creator of and friends with Cheese, as both of them get along because of their odd doings. Despite appearing older than Mac, her exact age has never been stated.
• Terrence (voiced by Tara Strong) – Mac's sadistic older brother and the recurring villain of the series. He enjoys bullying Mac and coming up with various schemes to make Mac's life hard and miserable. His stupidity always gets the better of him, making him easily outsmarted by Mac or Bloo.
• Cheese (voiced by Candi Milo) – The simple, dimwitted, light yellow imaginary friend who debuted in "Mac Daddy." Cheese was thought to be an imaginary friend accidentally created by Mac, but was actually created by Mac's neighbor Louise. He appears to be a nuisance and dimwitted, often saying incoherent or non-sequitur phrases, and breaking into sudden bouts of screaming when frightened or when he does not get his way. Cheese likes goldfish crackers, cereal, juice, chocolate milk (although he is lactose-intolerant), et cetera. He is prone to flatulence. In the series finale "Goodbye to Bloo", he becomes the newest resident at Foster's due to Louise moving to an apartment that doesn’t allow imaginary friends, much to the other residents' horror.

Recurring imaginary friends

• Fluffer Nutter (voiced by Grey DeLisle) – A small pink squirrel-like friend.
• Bloppy Pants (voiced by Jeff Bennett) – A shy and nervous grey tabby cat-like friend.
• Yogi Boo Boo (voiced by Tom Kenny) – A tall green giraffe-like friend who speaks with an Indian accent. His name is a parody of Yogi Bear and Boo-Boo Bear.
• Billy the Squid (voiced by Tom Kenny) – A pink octopus/alien-like friend with 3 horn-like appendages on his head.
• Sunset Junction (voiced by Keith Ferguson) – A tall navy blue bear-like friend with carpet-like fur wearing a woolen scarf.
• Jackie Khones (voiced by Phil LaMarr) – A tiny green one-eyed stick figure-like friend. Despite his tiny size, He speaks in a deep voice.
• Handy (voiced by Keith Ferguson) – A friend who appears as an animate baseball mitt.
• Scissors (voiced by Tom Kenny) – A friend who resembles a pair of scissors with bird-like legs with the scissors forming a beak.
• Uncle Pockets (voiced by Kevin Michael Richardson) – An old clown-like friend who resembles Willy Wonka, the Cat in the Hat or the Mad Hatter, considered widely to be the best imaginary friend ever.

Other characters

• World/Tyrant King (voiced by Max Burkholder) – An imaginary friend, and the main and later former antagonist of "Destination: Imagination".
• Red (voiced by Phil LaMarr) – Terrence's imaginary friend and rival, who he creates in "Seeing Red". Red is a red-colored cube-like creature similar to Bloo with arms and a face but no legs and refers to himself in third person.
• Ivan (voiced by Kevin McDonald) – A seeing-eye friend created by a blind kid named Stevie (a parody of Stevie Wonder and Steve Urkel) with over 100 eyes. He is first seen in "Sight for Sore Eyes".
• Berry (voiced by Grey DeLisle) – A polite magenta friend. Has a crush on Bloo, but dislikes how close Mac and Bloo are. Berry is jealous and disrespectful of Mac despite the latter being Bloo's creator.
• Bendy (voiced by Jeff Bennett) – A short, yellow Grinch-like friend with black stripes, the main antagonist of the equally non-canon episode "Everyone Knows It's Bendy." Bendy was put up for adoption by his family when they could no longer tolerate his destruction around their house. Immediately after his arrival, he begins committing crimes, such as breaking a vase and leaving mud in the house, and framing the other imaginary friends, getting them punished for his wrongdoings until Bloo comes up with a master plan. Due to Bendy never actually getting any consequence for his actions even by the end of the episode, the other characters being constantly punished for his crimes, and Mr. Herriman and Frankie acting way out of character by siding with him, Bendy's appearance was so infamous that writer Lauren Faust apologized for writing the episode that he appeared in, and he was permanently written out of the show and the episode was declared non-canon as a result. According to Faust, Bendy was originally supposed to be a 30-something-year old human man posing as an imaginary friend, but Cartoon Network executives forced them to rewrite the concept into Bendy himself, leading to Faust and Craig McCracken not liking the character themselves.