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Here be the Foster's Home for Imaginary Friends characters and the tropes they embody.

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Main Characters

The "Fosters Five"



Voiced by: Sean Marquette

A creative, smart, and very warm-hearted 8-year old. Bloo is his imaginary friend.

  • Adorably Precocious Child: Despite the fact that he's only 8, all of the main cast relies on him for advice and planning. He lampshades it frequently.
  • Author Avatar: Craig McCracken based Mac on himself as a child. His mother actually noted on it.
  • All-Loving Hero: He's friendly and compassionate with just about everyone. The only exceptions are his brother Terrance, Duchess, and Berry.
  • Ax-Crazy: Usually, no. But Mac's personality goes from a very Nice Guy to completely psychotic if he gets even the smallest amount of sugar.
  • Badass Adorable: He doesn't "fight" often, but when he does...
  • Big Eater: Only when it comes to sugar. Just one small amount of it will drive him into a frenzy of devouring anything sweet he can find.
  • Birthday Hater: With a twist; Bloo giving him surprise partys on almost any day except the actual day of his birthday (with one exception), he's grown something of a hatred towards them. It's mainly because he's put in embarrassing situations.
  • Break the Cutie: If Bloo is separated from him. Even if Bloo causes his most woobie-ish moments, he becomes an even bigger woobie.
  • Cain and Abel: He's the unfortunate Abel to his brother Terrence's Cain.
  • Captain Ersatz: Mac is already pretty similar to Linus Van Pelt, being an introverted Adorably Precocious Child who wears red, but then you remember that Bloo is basically a living Security Blanket that he gets guff for still hanging on to!
  • Characterization Marches On: In the season 1 episode "World Wide Wabbit", Mac is seen at one point eating cookies, but it's later revealed in season 2 that should he eat sugar, he becomes a crazy lunatic. Those cookies were possibly sugar-free, but still, makes you wonder...
  • Cheerful Child: Even if something does get him down, it never keeps him down for very long.
  • Chivalrous Pervert: The pervert part is implied, the chivalrous part is clear-as-day.
  • Cloudcuckoolander's Minder: The one who keeps Bloo in place.
  • The Conscience: For Bloo. Without Mac, Bloo would probably be a complete and total asshole.
  • Covert Pervert: He was very curious of the "Adults Only" movies Frankie kept in her room. All the same it could be sort of excused, since it doesn't have to prove he's actually perverted; any child would be curious of what the adults are hiding from them.
  • The Cutie: Mac is likable, sweet, and precocious.
  • Disappeared Dad: Mac's father is never mentioned. He just has his mom and big brother.
  • Foolish Sibling, Responsible Sibling: The responsible to Terrence's foolish. Mac is a precocious 8-year-old who doesn't let the fact that he still owns an Imaginary Friend get in the way of his emotional maturity; Terrence is a Dumbass Teenage Son who bullies his little brother for no reason, takes the blame out on him, and cries to his mother over his own fault.
  • G-Rated Drug: NEVER give Mac sugar. Seriously. It also seems to be treated as a G-rated equivalent to alcohol by him, as in the episode where he hangs out with a new kid named Barry ( who later turns out to have been Berry in disguise), Mac goes to the ice cream parlor at night and orders large amounts of sugary ice cream to make him forget about his troubles.
  • Heroes Want Redheads: His crush on Frankie.
  • Heterosexual Life-Partners: With Bloo. While the two often squabble a lot, they're best friends and would be nowhere without each other.
  • Hilariously Abusive Childhood: Most of the abuse he endures at the hands of his brother is done for comedy.
    Terrence: Wait, I just want to punch you!
  • Kiddie Kid: Or at least what his mom perceives him as. Mac is 8 years old and absolutely refuses to give up his imaginary friend despite his mother's advice.
  • Living Emotional Crutch: He's often one to keep Bloo's stability in line and prevent him from becoming an even bigger asshole.
  • Masculine Girl, Feminine Boy: The Feminine Boy to Frankie's Masculine Girl. Mac is a bit overly nice and unable to conform to masculine stereotypes, while Frankie has a streak of condescending attitude and aggression thanks to the excessive bossiness of Mr. Herriman.
  • Morality Pet: He is the only living being that Bloo genuinely and consistently shows compassion and care for.
  • My God, What Have I Done?: While Mac said what he did (see Rage Breaking Point) because he was so steamed, he looked in the present Goo was about to give him. Turns out she fixed the backpack that was rendered unusable from a broken strap at the start of the episode. Needless to say, Mac realized he shouldn't have snapped and apologized to Goo.
  • Nice Guy: In contrast to his rude and selfish imaginary friend, Mac is a very kindhearted person.
  • Not So Above It All: Loads of times. Many episodes, particularly as the show went on, are built around him doing something more childish with Bloo and not being the voice of reason — or ironically applying his reason and wisdom to something immature. Imaginary friends also appear to take up qualities of their creators, and he is the one who made Bloo in the first place. So in a way, it makes sense that he has a more chaotic part to his personality. He once got detention for shooting spitballs in class — a very Bloo-esque behavior — and when left in Foster's alone with Bloo, it's Mac who decides to go wild.
  • Only Sane Man: Despite only being 8 years old, Mac is probably the most moral person of the cast, in contrast to his best friend. This trope, however, is wonderfully averted if he eats too much sugar.
  • Out of Focus: Not in the show, but in the merchandise. Whenever merchandise of the series is released, expect Cheese to take his place (except for one shirt with both him and Cheese on it, and at least he did get a stuffed animal and figurine of himself).
  • Ping-Pong Naïveté: Rarely, but the show does still remind us that he's eight sometimes. For example, in "Camp Keep A Good Mac Down" he's his usual Wise Beyond Their Years self, basically being the only thing keeping the crumbling camping trip afloat — except for the scene where Eduardo tells him a scary story and he starts freaking out like a kid his age normally would.
  • The Pollyanna: What else can you call someone who's been able to stay optimistic despite the trouble that occurs at home, suffering from loneliness, and having a best friend who treats you like absolute crap?
  • Precocious Crush: His crush on Frankie.
  • Puppy-Dog Eyes: Always on, a combination of the show's art style and the interesting shape of his head.
  • Rage Breaking Point: After getting barred from Foster's — and his only friend — because of Goo's antics and obliviousness, Mac decides he's had enough of her and lets loose everything he's thought about her in the past few days he's had to put up with her. Thankfully, he makes it up with a heart-to-heart talk and apologizing.
    Mac: "I don't like you! Don't you get it? Nobody likes you! You're annoying and weird and you talk too much, and Bloo's name is not Chester, Mr. Herriman is not a badger, that's not how you play checkers, and protein doesn't come from bananas, it comes from nuts, which you don't need to eat more of because you are nuts! You're chock full of nuts! You're so nuts, you drive me nuts! (Jumps in Goo's face) Get it? Get it? Get it? Get it? Get it? Get it? Get it?! Everybody thinks you're a nuisance and they all want you to just GO HOME!"
    Goo: (runs off in tears)
  • "The Reason You Suck" Speech: Delivers one to Goo in "Go Goo Go". Results in My God, What Have I Done?.
  • Red Oni, Blue Oni: The Blue to Bloo's Red. Mac is rational and mature for his age, while Bloo is wild, hyperactive, and overconfident.
  • Savvy Guy, Energetic Girl: Savvy Guy to Goo's Energetic Girl. Mac is generally portrayed as having common sense if a bit idealistic himself, while Goo is basically his exaggerated female counterpart.
  • Sensitive Guy and Manly Man: The Sensitive Guy to Bloo's Manly Man. Mac is the introverted and codependent little boy while Bloo is the Know-Nothing Know-It-All jerkass. He and Terrence also respectively play the same roles, as Mac flees at the first sight of Terrence's bullying and can hardly stand up for himself, while Terrence is downright spiteful and not hesitant to physically harm his little brother.
  • She's Not My Girlfriend: Says this regarding Goo.
  • Ship Tease: With Goo. He once held her hand to lead her out of Foster's, and she asked him slyly why he was doing that, which led many residents of Foster's to believe they were going steady, which he denies. This nearly gets him banned from Foster's since, as Frankie put it, "She only comes to see you and you won't tell her to leave."
  • Shrinking Violet: Not quite as shy as most examples, but he's still a pretty introverted 8-year-old boy.
  • Straight Man: Mac is the voice of reason for Bloo.
  • Squishy Wizard: In a world where a child's imagination can be given life, he's exceptional. But he's still exactly as strong as a little boy could be expected to be.
  • Stepford Smiler: In "Go Goo Go" when he has to tolerate Goo's antics, until he finally snaps. One could say he's Type A all the time, due to his depressive home life. However, it's not confirmed and it's debatable.
  • Sweet Tooth: He really likes sugar, but he can't eat it because he'll go on a raging bender.
  • This Means Warpaint: He dons warpaint on his face in "I Only Have Surprise For You" when he tries to sabotage his own surprise birthday party.
  • Vitriolic Best Buds: With Bloo. Not in the pilot, but in the rest of the series.
  • Vocal Evolution: His voice gets lower and somewhat scratchy after a while, due to his voice actor hitting puberty. This is very noticeable, especially when on the DVD Commentary for "Store Wars", you can hear him (the DVD came out during season five) talk against his higher voice in season one.
  • Wise Beyond Their Years: Most of the time he acts mature and responsible beyond his years, though he can act his age and be as childish as the rest of them Depending on the Writer.
  • Your Size May Vary: In some episodes, he's as tall as Bloo, but in others, he's taller. Justified, as he's 8 years old and was probably going through a few growth spurts.

    Blooregard "Bloo" Q. Kazoo
We'd tell him to get a clue, but he'd have Wilt do it for him instead.

Voiced by: Keith Ferguson (English), Noriaki Sugiyama (Japanese)

Mac's reckless, hyperactive imaginary friend. Mac's complete opposite; however without him, Mac would do everything Bloo says and does.

  • Acquainted with Emergency Services: In Season 2, "My So Called Wife", he and several other people are thrown in jail for a night after a phony benefactor threw a fake gala in someone's mansion without permission and the owner has everyone arrested for trespassing. Everyone was released from jail in the morning leading to him saying goodbye to the police officer.
    Mac: What a crazy night.
    Bloo: Eh. I had worse. (to a police officer) Good seeing you again, Charles. Say hi to the kids for me.
    Charles: Will do, Bloo.
  • Animate Inanimate Object: It's subtle, but Word of God claims that he is an anthropomorphic Security Blanket.
  • Anti-Hero: Whenever Bloo tries to save the day, it'll backfire on him. Though at times, he has appeared heroic.
  • Anti-Role Model: Bloo's a perfect example of how not to behave: He's whiny, selfish, narcissistic, smart-alecky, rude, causes annoyance and inconvenience for others, finds loopholes around everything, is willing to throw others under the bus for his actions, and is not a very loyal friend. He also serves as this in-universe for Mac, as he is intended to show Mac how not to behave.
  • Asshole Victim: Whenever Bloo meets his own end, he deserves it most of the time for being a jerkass.
  • Attention Deficit... Ooh, Shiny!: Put a paddle ball in his sight, don't expect to hear from him for a while.
  • Attention Whore: If anyone's attention is somewhere else, he'll do everything he can to bring it back to him.
  • "Awesome McCool" Name: Blooregard Q. Kazoo is a pretty kick-ass name if you think about it, especially the rarity of a last name related to a musical instrument.
  • Berserk Button: Being ignored annoys him, but being referred to as a "sidekick" is enough to completely send him over the edge, as shown in "Make Believe It or Not."
  • Big Brother Instinct: Despite his characteristic rudeness, Bloo will often sacrifice his selfishness to stand up for Mac whenever he's being bullied by his real big brother, Terrence, exploiting the latter's stupidity in the process. He also exhibited this side to the less-than-mentally-stable Cheese in "Mac Daddy" after realizing how much risk he'd be taking by letting the poor little dude walk independently. Then he reverts back to hating him by the end when he and his owner reunite, realizing that he already has someone to keep him in line.
  • Big Eater: He tends to have a huge appetite for junk food like burgers, fried chicken, cheese fries, pie, chocolate cake, tacos, whipped cream, ice cream, juice boxes, chips, soda and his favorite, pizza.
  • Big, Thin, Short Trio: Of the three male imaginary friends, he's the Short to Eduardo's Big and Wilt's Thin.
  • Bratty Half-Pint: He's whiny, selfish, and complains when he doesn't get his way.
  • Butt-Monkey: He gets bulldozed over by lots of people, mainly cause he's puny and small. The most common example is that Herriman is always threatening to give him away to a kid if Mac doesn't arrive at the house by 3 P.M. everyday. Then again, considering that Bloo tends to cause even more strife to the other occupants of the home (especially Frankie), he kinda has it coming.
  • Characterization Marches On: The Pilot shows him to be much friendlier, with a few snarky qualities and seeming to have a generally good grasp on things.
  • Cloudcuckoolander: Bloo is prone to coming up with crazy ideas and using Insane Troll Logic to defend himself.
  • Comically Small Bribe: Bloo will frequently try and buy others off with pocket change.
  • Deadpan Snarker: Bloo often makes sarcastic remarks, yet he didn't even know what sarcasm is back in "My So Called Wife".
  • Deuteragonist: The main secondary focus, though he switches between this and being The Protagonist with Mac very often.
  • Everyone Has Standards: Bloo may be a Jerkass, but even he can't stand how snooty and bitchy Duchess is.
  • Flanderization: He started out being very protective of Mac. Then he became a Jerk with a Heart of Gold in season one, more of a Jerkass in season two, and by the later seasons, more than a few fans were wishing that Mac would just leave Bloo already.
  • The Friend Nobody Likes: Mac (his creator) genuinely likes him; at best the others tolerate him due to Proximity and Supervision.
  • The Gadfly: Bloo provokes others for fun.
  • Genius Ditz: Bloo lacks common sense, yet he's too clever for his own good when it comes to finding loopholes and manipulating others to get what he wants.
  • Heroes Want Redheads: His (very shallow compared to Mac's) crush on Frankie.
  • Heterosexual Life-Partners: With Mac. While they squabble a lot, their lives would be nothing without each other.
  • Hidden Heart of Gold:
    • When he thought that Eduardo had died he was devastated, and said nobody else deserved to be him. When Eduardo came back to Foster's, he acted like he normally did, and said he didn't miss him at all. When everybody else left, Bloo hugged Eduardo, and told him he missed him.
    • After Mac, who has been blamed for Bloo disregarding the rules of not allowing Goo into fosters, is told by Frankie and Mr. Herriman (politely) that he is no longer welcomed at Fosters, while everyone else on the bus gives Mac a sympathetic look, Bloo's expression to Mac says as clear as crystal that he is truly sorry for what he did to him.
  • Idiot Hero: More ignorant than stupid.
  • Innocently Insensitive: Played with. He's far from being innocent and became a progressively bigger jerk to others up until near the end, but it's sometimes implied that Bloo — much like a very young or immature kid — honestly might not understand just how selfish or mean-spirited his actions and behavior can actually be, let alone the potential consequences of them, and only near the finale did he actually start getting some awareness of it. Also, Bloo is apparently 5 years old. If human and imaginary friend years are alike, then this possibly reinforces Bloo's obliviousness to his insensitivity.
  • Insane Troll Logic: Bloo frequently tries to incorporate screwed-up logic into situations to excuse his actions.
  • It's All About Me: Frequently prone to wondering aloud why no one is focusing on him. Doubles as Attention Whore.
  • Jerkass: Bloo becomes a bigger jerk each week, though he seemed to be leveling off at the end. The TV movie (where Wilt is trying to find his original creator) implies that the "negative" aspects of the imaginary friends are an unconscious Secret Test of Character for their kids: Wilt's Extreme Doormat-ness encouraged his boy to be a better sportsman while Eduardo's meekness made his girl — a future policewoman who dreamed him up to be her protector — be more courageous. Thus, Bloo's Jerkassness shows Mac how not to treat his friends everybody.
  • Jerkass Has a Point: In "Partying is Such Sweet Soiree", when Mr. Herriman chews him out for throwing a wild party while Madame Foster was away when she forbade it, Bloo points out to Mr. Herriman that he'll get in trouble when Madame Foster returns as well because he promised no wild parties would happen under his watch. While it was Bloo's fault Mr. Herriman left the house without his supervision in the first place, Bloo was still right about Mr. Herriman not doing his job by keeping things under control.
  • Jerkass Realization: Bloo realizes how much of a jerk he's been over the course of the series in "Bad Dare Day" when Mac mocks his attitude.
  • Jerk with a Heart of Gold: At least toward Mac (See Hidden Heart of Gold) though how much Depends on the writer.
  • Jerk with a Heart of Jerk: Whenever he usually helps out his friends, there's some shallow, selfish motive being his actions.
  • Karma Houdini: Most of the time. Especially in the example where he stole the bus, at the end where a Bloo clone is getting chewed out by Frankie for all the trouble he caused, the real Bloo is sneaking off with the bus again. He also is never discovered to have actually been the one who was repeatedly letting Goo into Fosters the whole time instead of Mac, nor does he receive a comeuppance.
  • Karma Houdini Warranty: There are times where Bloo's insensitivity comes back to get him. He implies at one point that he's been sent to prison enough times to have a friendly relationship with the guards.
  • Know-Nothing Know-It-All: Constantly insists that he's right about everything when in reality he's just an uncertified smartass and a dumbass.
  • Lack of Empathy: He displays little regard to the feelings and well-being of others.
  • Large Ham: He's pretty dramatic at times.
  • Laser-Guided Karma: Zig-zagged and Played With as sometimes he can get away with the trouble he causes while other times his douchiness will come back to bite him in the ass. The ending of "Bloo Tube" is among the few times where the latter is the case, where Bloo is seen crying as his friends left him behind to go to the water park (which Bloo admittedly deserved due to his mistreatment of everyone throughout the episode).
  • Lazy Bum: Bloo is very often seen laying down on the couch, eating junk food and watching TV.
  • Loophole Abuse: Regardless of the trouble Bloo has gotten himself into, the clever bastard can always find his way out of it.
  • Manchild: While he's technically 5 years old, he's presumably an adult in imaginary friend years. However, he often behaves like a whiny brat whenever he's not getting his way.
  • Manipulative Bastard: Say what you will about his maturity level, but Bloo's silver tongue is one of his most consistent traits. The guy can talk his way into a favorable position in just about any situation he finds himself in.
  • Mars Needs Women: He temporarily develops a crush on Frankie in "Frankie my Dear".
  • Meaningful Name: He is indeed blue.
  • Narcissist: He is very self-centered.
  • Never My Fault: Bloo lacks responsibility for his actions and is not above throwing others under the bus for such. This becomes evident at the end of "Bus for Two Us", where Frankie is seen scolding a clone version of Bloo for using the Foster's bus when she explicitly told him not to, with the real Bloo going scot-free and watching the situation from a distance.
  • No Indoor Voice: At times he overreacts and yells his sentences when it is of no profit of him to do so.
  • Oblivious to Love: Is completely oblivious to Berry's stalker crush on him. In fact, he can never remember her name or in some cases, her existence.
  • Outgrowing the Childish Name: Parodied in "The Bride To Beat". Fearing that Mac'll outgrow him, Bloo decides to act like an adult. This includes changing his name from "Bloo" (short for "Blooregard") to "Bob".
  • Pet the Dog: Even post Flanderization, he still sometimes shows his soft side such as apologizing to Coco after realizing how much of a jerk he acted as in "Cuckoo for Coco Cards" or missing Coco, Ed, and Wilt when they all move out of the room in the end of "Room with a Feud".
  • The Prankster: He revels in playing pranks on others; this trait of his is expounded on in "Nightmare on Wilson Way" and "Pranks for Nothing", the latter episode in which he does everything he can to dominate in an all-out prank war among the Friends.
  • Precision F-Strike: In a mostly G-rated series, he tells Mr. Herriman in "Imagination Destination" after he asks what's going on "You pissed him off, that's what!" According to the voice actor, it may also have been a Throw It In! moment.
  • Red Oni, Blue Oni: The Red to Mac's Blue, ironically enough. Mac (Blue Oni) frequently tries to impart rationality and logic into the Know-Nothing Know-It-All Bloo (Red Oni).
  • Sarcasm-Blind: Quite literally, even when he's being sarcastic. Mac and Frankie have to actually teach it to him (with mixed success).
  • Schemer: He quite often comes up with a plan to satisfy his own self-centered interests and goals.
  • Screams Like a Little Girl: He already has a high-pitched voice as is, but when he screams, it becomes even squeakier.
  • Send in the Clones: In "Bloo's Brothers", he sends clone versions of himself into the house.
  • Sensitive Guy and Manly Man: The Manly Man to Mac's Sensitive Guy. Despite Mac's maturity and precociousness, he is otherwise lonely and emotionally regressed without his jerkass companion Bloo.
  • Small Name, Big Ego: Somewhere along the line, he got the idea that he was the greatest imaginary friend ever. Needless to say, he's anything but.
  • Smart Ball: Held this in "Trouble With Scribbles", being quick to find out how the scribbles worked and how they could be helpful rather than nuisances. Due to his selfishness however, it was Mac who actually shared this knowledge with the rest of the house.
  • Smug Snake: Bloo is a real smartass who almost always speaks in a condescending sarcastic tone of voice, belittles his friends as much as his enemies, and thinks he's better than everyone else. In reality, he's just a stupid jerk whose plans always backfire.
  • Spoiled Brat: Bloo has the temper of a spoiled child and frequently whines in pursuit of his way, often to varying success. The time this worked best was when he deliberately antagonized the Friends in "Cuckoo for Coco Cards" to be granted their valued trading cards.
  • Took a Level in Jerkass: After the pilot episode, Bloo became more self-centered and rude. His Jerkass tendencies only increase as the series continues.
  • Toxic Friend Influence: Bloo's mischievous advice often leads Mac into trouble.
  • Trademark Favorite Food: Pizza. He orders it frequently and he eats or mentions pizza more often than other foods.
  • Tsundere: A MAJOR type A. His nice side only comes out with Mac most of the time, and only if prompted.
  • Unsympathetic Comedy Protagonist: Bloo's a selfish jerk who's not worth rooting for any time he suffers. Despite this, his Jerkass personality is clearly meant to be funny and make people root for him anyway.
  • Vague Age: Bloo is stated to be 5 years old in one episode; whether imaginary friend years and human years are alike remains unknown, but this furthers curiosity as he sounds like a teenager or young adult and uses clever manipulation and Loophole Abuse methods very often, yet he behaves like an absolute child.
  • Villain Protagonist: In the later seasons, he becomes borderline sociopathic.
  • Vitriolic Best Buds: With Mac. Not in the pilot, but in the rest of the series.
  • Vocal Evolution: Seems to be a byproduct of the Flanderization; as his voice got more nasally and whiny, his personality degenerated into Jerkass.
  • With Friends Like These...: His relationship with Mac is far from being smooth, seeing as how Bloo always belittles his sanity and common knowledge. Same goes for his relationship with everyone else in the house.

Nothin' but net.

Voiced by: Phil La Marr

A one-armed imaginary friend desperate to be a nice person and gain acceptance. Is that okay?

  • Adorkable: He's clumsy, friendly, and apologetic.
  • All of the Other Reindeer: Most of the other Friends take advantage of his kindness remorselessly. Downplayed, as they seem to like him just fine, they just can't resist making him do ridiculous things for them.
  • Apologises a Lot: Half of his dialogue starts with "I'm sorry, but that is not okay!" or at least some variation of "I'm sorry, but...."
  • Berserk Button: Wilt is not a fan of height jokes.
  • Big Brother Mentor: He can be this to Eduardo. He was also this to his creator.
  • Big, Thin, Short Trio: Of the three male imaginary friends, he's the Thin to Eduardo's Big and Bloo's Short.
  • Cannot Tell a Joke: Not even when reading them off of a cue card.
  • Catchphrase: "Is that okay?"
  • Chest Insignia: The number 1 on his torso.
  • Cool Big Bro: The best guy to have as a basketball buddy, but unfortunately his caring nature is exploited on one too many occasions. It's also implied that he was this at one time to Frankie due to his being markedly older than her (and on a few occasions, still is).
  • The Dog Bites Back: There are times where Wilt finally becomes courageous to snap at others taking advantage of his kindness, most notably towards Bloo in "Where There's a Wilt, There's a Way". However, he'll usually lose whatever spine he grew and revert back to his doormat-ness by the next week.
  • Extreme Doormat: The poor guy just can't say no to a request for help. Even if he does, it's after he's been pushed around too many times.
  • Fashionable Asymmetry: Wilt is missing his left arm, and his left eye is small and deadened compared to his right.
  • Gentle Giant: He's very tall and also quite amiable.
  • Handicapped Badass: He might be missing an arm and an eye, but his basketball skills haven't taken a hit.
  • Heroic Sacrifice: Wilt threw the basketball game in order to save his creator from being crushed under the rival imaginary friend. Wilt lost his arm, his left eye, and the game in the process of saving a life.
  • Meaningful Name: Named after Wilt Chamberlain.
  • My Greatest Failure: Good Wilt Hunting reveals his greatest shame. Losing a basketball game with his creator, who at the time took it hard. Wilt felt so ashamed he ran away.
  • Named After Somebody Famous: Is named after famous and famously tall Wilt Chamberlain, which refers to his love for basketball and being a Gentle Giant.
  • Nice Guy: Somewhat deconstructed; his niceness is constantly exploited.
  • O.O.C. Is Serious Business: In "Room With a Feud", when a basketball-themed room with high ceilings and a ten-feet long bed becomes available to anyone who wants it, he becomes cocky and selfish and competes against Eduardo, Coco, and Bloo for it. When Bloo tries to talk him out of it by telling him that if he takes it, it'll hurt his feelings, Wilt tells him he thought about that and decided he doesn't care. It is also revealed in that episode that in all the years Wilt's lived at Foster's, he's never had his own room.
  • Reasonable Authority Figure: Even though 99% of the time he's fine with being childish and goofy like one of the kids, there are moments where he does stand his ground and reminds everyone, including the viewers, that he's one of the adults in the Foster's house.
  • Scars Are Forever: As a result of a Heroic Sacrifice he made when he and his creator were younger.

Coco coco coco coco coco coco coco coco! Coco!

Voiced by: Candi Milo

A palm-tree/aeroplane imaginary friend with a language based on her own name.

  • Abnormal Ammo: Of sorts, she lays eggs that can hold anything from bubbles to an anvil, so they could easily be used as weapons if there's something heavy enough in them.
  • A Day in the Limelight: Two: "Cuckoo for Coco Card" and "Mondo Coco".
  • Balloon Belly: She's actually really self-conscious about it.
  • Bilingual Dialogue: She'll talk in her Pokémon Speak, the characters will respond with normal language.
  • Cargo Ship: In-universe; she's shown affection towards a lamp and a mop.
  • Cloudcuckoolander: She has pretty strange beliefs and quirks, like the aforementioned falling for a lamp and mop.
  • Dark and Troubled Past: While it's never stated in-universe, Word of God says that Coco was created by a little girl who was stranded on a desert island. This explains Coco's bizarre appearance (body = plane, face = palm tree, lips/beak = deflated raft), her insanity, and her willingness to protect others. Made even more apparent if you take a closer look at her aeroplane body: it looks almost crumpled up in places, as a plane would look if it had crashed.
  • Handy Feet: She has no arms so she essentially uses her feet as a substitute for her hands.
  • Happily Adopted: Her real creator is unknown, but she was found and took in by two guys who appreciated her bizarre nature.
  • Hidden Depths: Despite her weirdness, Coco seems to be the most resourceful and practical member of the clique, often coming up with the right solution in a pickle.
  • Interspecies Romance: She briefly shacks up with a yeti in "Mondo Coco".
  • The Loonie: There's no rhyme or reason to what she does or mumbles. It's not clear if she's just doing it for laughs or she's just insane.
  • Murder Is the Best Solution: While we can't really be sure, there have been three instances when her suggestions against a problem involve something that Mac and Frankie said "would get them into jail" or "be illegal", respectively.
  • Nice Girl: Most of the time Coco is good-natured.
  • Pokémon Speak: All she can say is "Co-Co" oddly enough, she can only write Coco as well.
  • Reality Warper: Sometimes. The only reason this case is noteworthy is the fact that she's the only imaginary friend who seems to do this.
  • The Unintelligible: Zig-zagged. The audience can't understand her, but the main cast sometimes can and sometimes can't.

It'll be okay, big guy...

Voiced by: Tom Kenny

An imaginary friend resembling a huge, hairy monster who has an infantile mind and is scared of everything.

  • Adorkable: Super friendly, and incredibly kooky.
  • Big, Thin, Short Trio: Of the three male imaginary friends, he's the Big to Wilt's Thin and Bloo's Short.
  • Bilingual Bonus: Occasionally, he uses Spanish words in his dialogue, and has a Hispanic accent. Understandable considering that his owner is Hispanic.
  • Berserk Button: Just don't mess with his friends... (or former owner) And while he may act like a crybaby, he does not like being treated like a baby.
  • Beware the Nice Ones: Cowardly and soft though he may be, when pushed, Eduardo makes it very clear that he's one of the strongest characters in the show.
  • Big Ol' Unibrow: He has a giant monobrow over his eyes.
  • Cloudcuckoolander: He can be rather absentminded.
  • Cowardly Lion: Having a protector backfired. Instead of teasing her, the bullies started to attack Ed, who was too cowardly to defend himself, despite his looks.note  Ed's a natural cry-baby, and refuses to go into a situation unless someone's beside him or he's in a group, and even then he's not going to be happy.
  • Cuddle Bug: Gives (nearly bone-crushing) hugs to people he's worried about.
  • Does Not Know His Own Strength: And with his hugs come complaints of wanting to be let down.
  • Face of a Thug: He looks like a savage beast when he's anything but.
  • Freaky Fashion, Mild Mind: He wears a black, studded belt with a menacing looking skull on it, yet he's a sweet and loving Gentle Giant.
  • Friend to All Living Things: "Land of the Flea" has him making friends with and becoming very protective over a large group of fleas that infest his fur.
  • Gentle Giant: His owner, now a grown police officer, made him to not only have a playmate as well as protector from bullies, but to also have someone who was gentle enough to play with her baby brother.
  • Gratuitous Spanish: He peppers Spanish phrases into his dialogue. In his case, English appears to be his second language, so he drifts in and out of it.
  • Lovable Coward: Eduardo makes up for his easily frightened nature in kindness.
  • Meaningful Name: His name is Spanish for 'Edward' which in English means 'wealthy guardian'. The latter applies to how he's always protective of his friends and how he was originally created to protect both his creator and her little brother. The ending and credits to "The Buck Swaps Here" reveals that Eduardo is more wealthy then he leads on.
  • Never Trust a Trailer: A variation. On the show's slowly-growing character pages on Cartoon Network's site long before the pilot was aired, after the bright and colorful characters (Mac, Bloo, Wilt, and Coco) were trotting happily across the screen, Eduardo was seen running furiously toward the camera. At that moment, it actually seemed like he was the villain of this show! But when his character page on the site finally came around, it makes it clear he's anything but.
  • Nice Guy: Is one of the most gentle friends in the entire house, despite his menacing appearance.
  • Papa Wolf: Don't hurt his friends or he'll attack.
  • Real Men Wear Pink: His Gentle Giant personality aside, "Eddie Monster" shows that he is quite the formidable and tough fighter when he chooses to be. However, in "Squeakerboxx", after winning tickets at a video arcade, he opts for a prize of two pink hair clips and states that he likes the color pink. Later in the episode he also plays with a plastic, elephant squeak toy as if it's a baby.
  • Secretly Wealthy: It's revealed at the end of an episode that Eduardo has a safe full of riches he keeps in his toy chest. Turns out he's made a lot of smart investments.
  • Super Strength: He is capable of carrying a bus around as if it wasn't even there. Though considering his size...
  • Trademark Favorite Food: Potatoes, to the point that he curiously carries around a potato sack wherever he goes.
  • Why Did It Have to Be Snakes?: He's frightened by a lot of things, but spiders scare him the most.

Fosters Staff

  • Gentle Touch vs. Firm Hand: Herriman is 100% Firm Hand, his MO being to enforce the rules as strictly as possible. Frankie is far more flexible, with Destination Imagination playing up her skills as the Gentle Touch to further contrast Herriman. That said, she has no hangups about applying a little Firm Hand herself when necessary, just ask Bloo.
  • Nice, Mean, and In-Between: Frankie has the patience of a saint, Herriman is as uptight and rigid as they get, and Madame Foster shifts between "sweet old lady" and "sassy spitfire" as she sees fit.
  • Secondary Character Title: Mac is the protagonist. None of the Fosters is the main character: Madame Foster is the owner of the titular home that takes in "abandoned" imaginary friends (including Mac's friend Bloo), while her granddaughter Frankie is the caretaker.

    Frances "Frankie" Foster
A friend to all friends.

Voiced by: Grey DeLisle

Granddaughter of Madame Foster; caretaker at the mansion.

  • Alliterative Name: Frances Foster. Also applies with her nickname.
  • Almighty Janitor: She has to answer to Mr. Herriman and Madame Foster, but she basically runs the entire house all by herself. And as it turns out her pay check is actually larger than Mr. Herriman's.
  • Balloon Belly: The end of "Cookie Dough". Apparently Frankie's grandmother's cookies are irresistable enough to turn her into a temporary Big Eater with a side of crazy.
  • Bare Your Midriff: The t-shirt she's always wearing stops just short of her belly. It's more noticeable when her jacket isn't on.
  • Beware the Nice Ones: Frankie is an easygoing person, but you don't want to piss her off. Dylan finds this out after verbally abusing her friends and admitting to them his plans to imprison and enslave Frankie.
  • Blithe Spirit: She's very free-spirited and often chides Mr. Herriman about being a wet blanket. In "House of Bloo's" she even declares that rules are made to be broken. She and Madame Foster both fill this role.
  • Butt-Monkey: In a few episodes, especially "Imposter's Home", which is a half-hour-long Humiliation Conga that culminates in her being the only one to miss a concert she'd been dreaming of for months.
  • Cold Turkeys Are Everywhere: Don't let her know that Madame Foster made cookies.
  • Cool Big Sis: Takes this role wherever Mac is concerned. Also is this to a lot of the friends (especially Bloo, even though they drive each other crazy half the time, they also have fun working together to pull off zany schemes).
  • Dark and Troubled Past: According to Word of God due to Frankie's dad (who was Madame Foster's son) having a bad relationship with Mr. Herriman, Frankie wasn't allowed to have or create her own imaginary friends. When she finally created one of her own, she was forced to get rid of them thanks to her dad. Her main reason for living with her grandma in Foster's Home instead of with her parents? So she could see that same Imaginary Friend she herself created again someday.
  • Deadpan Snarker: She most notably makes remarks about Mr. Herriman ordering her around and complaining about how she does her work.
  • Dude Magnet: Mac, Bloo, Prince Charming, two geeks, a pizza delivery guy, and many more have fallen in love with her.
  • Dude, Where's My Respect?: She's a hard worker and more or less does every chore in the house, and Mr. Herriman still thinks she's a lazy good for nothing. Until "Destination: Imagination", where he realizes he's been taking her for granted and then institutes a system where the work is divided fairly among the housemates.
  • Fiery Redhead: She has red hair and especially gets furious when Mr. Herriman pushes her too far.
  • G-Rated Drug: Her grandmother's cookies. Let's just say it's best that she never catches wind of them.
  • I Can't Believe It's Not Heroin!: Her cookie obsession. They have a substance-like effect on her well-being after consumption.
  • Masculine Girl, Feminine Boy: The Masculine Girl to Mac's Feminine Boy. While not completely devoid of femininity, Frankie is passive-aggressive as a result of the excessive bossiness she receives from Mr. Herriman; Mac, on the other hand, has a degree of emotional sensitivity in that he becomes neurotic over peer isolation and never stands up to his brother's abuse.
  • Nice Girl: Frankie is a well-meaning and caring woman whenever she's not taking crap from her Mean Boss.
  • Not So Above It All: Shifts between being the voice of reason and being as immature and zany as most of the imaginary friends.
    • In "World Wide Wabbit", she laughs along with everyone else and happily works with Bloo to merchandise Mr. Herriman's "Funny Bunny" routine until Mac makes her destroy the copies and explains that her job will be tougher if he finds out, she then panics and has a similar conversation with Bloo.
    • In "Frankie My Dear", she handles Dylan's admission of being a faux nice guy who wants to turn Frankie into a slave by giving him a bloody nose and a wedgie, Moment of Awesome, yes, but still atypical for a 22 year old woman.
    • Rather than stop Bloo from mixing dangerous chemicals that nearly blows up the house, she simply makes a bet with him that it would be a bad idea in "Imposter's Home for Um... Make 'Em Up Pals". However immature you may find it, though, calling what happened afterwards Disproportionate Retribution would be the understatement of the millennium.
    • Most obvious when it comes to Madame Foster's cookies, which serve as a G-Rated Drug.
  • Only Sane Employee: Between the neurotic Mr. Herriman and the absent-minded Madame Foster, it often falls to Frankie to be the voice of reason.
  • Only Sane Woman: She plays the role as the only rational character unless it's Mac's turn.
  • Psychopathic Womanchild: Whenever Madame Foster makes her famous chocolate chip cookies, Frankie will regress into this.
  • Reasonable Authority Figure: If the imaginary friends have a problem, Frankie's their first choice to resolve it, and they'll avoid Mr. Herriman at all costs.
  • Redhead In Green: Typically a green jacket. She rarely removes it. Likewise, she wears a green robe in the bathroom in "Busted." Even when she's without her jacket, her shirt, being a reference to The Powerpuff Girls, has green on it.
  • She Cleans Up Nicely: Frankie can do hot.
  • Significant Green-Eyed Redhead: Not shown due to the art style but her drivers license says she has green eyes.
  • Single Woman Seeks Good Man: Proves this when she went on her date with Dylan. She initially liked him because he appeared to be a gentleman, but was immediately disgusted when she overheard him insult her friends and refer to her as a piece property.
  • Spiky Hair: Her hair ends in a lot of points.
  • Talking in Your Sleep: Frankie does this not once but twice in "Let Your Hare Down" when she has, err, fantasy dreams about action star Rod Tango.
  • Tomboyish Name: Frances "Frankie" Foster.
  • Tomboyish Ponytail: Has a spiky one.
  • Tomboy with a Girly Streak: Frankie is pretty in-between, though she's slightly more on the tomboyish side. She has fiery red hair pulled back into a Tomboyish Ponytail, goes by a Tomboyish Name, can be quite scrappy at times, is adept at fixing things and loves punk rock. Nevertheless, she seems to enjoy dressing up on occasion and absolutely loves wearing a princess-like gown in "Destination Imagination."
  • Trademark Favorite Food: Goes absolutely insane for Madame Foster's chocolate chip cookies, to the point of locking herself in her room for days while binging on them, as seen in "Cookie Dough."

    Mr. "Funny Bunny" Herriman
He'll have you know that there is a rule against false claims of sticks inserted into unmentionable areas!

Voiced by: Tom Kane

Madame Foster's imaginary friend; a Victorian, upper-class rabbit obsessed with maintaining order.

  • Antiquated Linguistics: He talks like a 19th Century English gentleman.
  • Berserk Button: Mr. Harriman does not like having his secrets revealed to the world as shown in World Wide Wabbit.
  • Blind Without 'Em: His monocle. Without it, he can't see anything. Presumably, he's blind in the eye that doesn't have a glass on it.
  • British Stuffiness: His accent serves to emphasize how tightly wound he is. He even provides the Image Source.
  • Cold Turkeys Are Everywhere: His addiction to carrots.
  • Dub Name Change: His named was translated as "Señor Conejo" (mister bunny) in the Latin American dub.
  • The Finicky One: He's almost completely devoid of humor and is constantly stressed out about something.
  • Freudian Excuse: A story in the 37th issue of Cartoon Network Block Party revealed that the reason he's obsessed with things being neat and tidy is because Madame Foster once blamed him on a mess she made and he didn't want to get into trouble by continuing to neglect messes.
  • Graceful Loser: Mr. Herriman is not above admitting when he has been defeated by his competition fair-and-square or admitting when he's wrong. In Setting a President, for instance, when Frankie beats him by a landslide for the position of Foster's Home President, not only was he willing to admit defeat, Herriman didn't even kick up a fuss about being beaten. In fact, since he lost his position to Frankie, he chooses to leave Foster's altogether, despite Frankie saying that he doesn't have to leave Foster's. Thankfully, this sad predicament doesn't last too long as Frankie realizes that being house president isn't all that it's cracked up to be and gives Herriman back his position.
  • Hero Antagonist: His desire to enforce the rules and keep the order of Foster's Home puts him in conflict with Blue more often than not.
  • High-Class Glass: His monocle.
  • Jerk with a Heart of Gold: He genuinely loves Madame Foster and children in general. However, he prefers to keep it hidden behind a stuffy no-nonsense exterior, as evidenced in "World Wide Wabbit".
  • Lawful Stupid: "Dinner is Swerved" provides a shining example of how the rules come before common sense in Herriman's eyes.
  • Literal-Minded: Enough to get the entire house locked outside of their new security system because he interpreted "enter a random number" on the PIN pad to mean "enter a random number every time".
  • Mean Boss: Infamously so. Poor Frankie constantly has to bend her back over to his excessive bossiness without snapping.
  • Neat Freak: He is obsessed with keeping everything neat and tidy (see Freudian Excuse above), to the point where at one point in Setting A President he was having the whole house alphabetize trash, to say nothing of the camping trip where he kept having Mac and the others tear down their tent because it wasn't perfect, even telling them to tear it down when it was "just right" because it wasn't right enough.
  • Nice Hat: His top hat.
  • Not So Above It All:
    • In "Cookie Dough", Bloo manages to con him into betraying Madame Foster and getting him the cookie recipe.
    • In "Beat with a Schtick", he forgoes his initial expulsion of Bloo—despite the latter's numerous confessions—in favor of letting him get beat to a pulp by the new guy. He does this almost immediately after saying that getting into a fight was "a direct violation of house charter."
    • In "Bloo Done It", he's just as excited by Uncle Pockets' return to Foster's as everybody else and doesn't even try to hide it.
  • Obstructive Bureaucrat: Can sometimes come off this way.
  • Rhymes on a Dime: His highly entertaining "Sweet Little Girl" routine.
  • Super OCD: He can't stand anything being out of place or disorganized.
  • Trademark Favorite Food: Carrots. He's quite addicted to them.
  • They Changed It, Now It Sucks!: invoked After finding out that people genuinely enjoyed his Funny Bunny routine, he tries to update it for modern audiences, not understanding that what people found joy in was the charming and sweet (and funny) Nursery Rhyme like feeling of the original. It's implied that afterwards the reaction was negative as there are no further mentions from the public of "Funny Bunny" (or perhaps like all instant web hits, it faded after a few months, either way it's implied that the hip hop update never caught on). Although in a later episode, they mention the original (reuploaded to YouTube) has over 12 million views, so perhaps the original Funny Bunny routine still was popular.
  • The Unsmile: In one of the few cases of his smiling ever being shown in the series, he tries to assure Frankie and the others that her decision to let World out of his box in Destination Imagination is a good idea. And then his mustache curls up, reveals his bunny buck teeth, and a full set of normal teeth beneath in a rather unnerving grin. The gang actually get somewhat terrified by him simply smiling.
  • Well-Intentioned Extremist: Most of his strict rules revolve around not wasting resources (as it's a common plot that Fosters' budget is very tight) and simply trying to keep a semblance of order in a building filled with some rather wacky creations. He has been shown to be a Reasonable Authority Figure at times, notably when Bloo accidentally knocked over a bust of Madame Foster and was terrified that Herriman would throw him out. Herriman instead calmly explained to him that he does not punish innocent mistakes, and that people have been knocking that bust over for years, even keeping a closet full of them.
  • Why Did It Have to Be Snakes?: Has a fear of dogs in "Who Let The Dogs In?", due him to being based on a prey animal. So great is his fear that he even called out "Frankie" instead of "Ms. Francis".

    Madame Foster
Living proof that "Growing old is mandatory, growing up is optional".

Voiced by: Candi Milo

Owner of the mansion; very lively for her age.

  • Badass Adorable: She's a cute-as-a-button elderly lady and she knows how to kick ass.
  • Big Good: As the owner of Foster's Home, she's the most significant and benevolent character in the series.
  • Blithe Spirit: She and her granddaughter, Frankie, both fill this role.
  • Cool Old Lady: She's much nicer than Herriman, and she often plays along with Bloo's antics.
  • Genki Girl: Even in her old age, she's got a lot of energy. Even Frankie can't keep up with her.
  • The Ghost: For most of the pilot movie, to the point where Bloo assumed she was dead.
  • Granny Classic: On her nicer days.
  • Jerkass Ball:
    • Madame Foster holds many of these throughout the series. A prime example would be Stealing the Europe tickets from Mac in "Foster's Goes to Europe" to travel with her friends was probably her lowest point in the series.
    • In the short "Birthday Cake Bloos", she devours Bloo's birthday cake for no reason at all and also has the gall to gloat to her granddaughter that she can't really be punished due to being the foster home's owner.
    • In "Beat with a Schtick" When she finds out Bloo is going to face "The New Guy" who's a gigantic monster looking figure what does Madame Foster do? She raises money off of Bloo's suffering by betting against him in a poll. For someone who's suppose to be the founder and head mistress of the household isn't Madame Foster suppose to care about the well being of the friends? But here she's betting against Bloo simply to watch him be in pain. And what she did had nothing to do with "The New Guys" joke.
    • At the very end of "Store Wars" she's completely ungrateful at Bloo's attempt to give her a Birthday present stating "the thought doesn't count".
    • Then in "The Big Lebooski" where she acts like a Raging Shrew and yells at Mac constantly, simply because she's mad that they aren't going to win. Then the plot twist being they weren't competing to win, but just to outdo her rival. So basically Madame Foster was a Jerkass to Mac for NO reason! She doesn't even apologize to Mac, she just thanks his dumb luck.
    • In Season 5's "Say it isn't Sew" she goes against the promise she made to Bloo about being in the sewing store, all while insisting he has to wait on her due to "partner loyalty" even though their main reason of being there was to fix a button that broke off her shirt. While Bloo wasn't totally innocent (as he asked for it for ditching Mac even though they would've made it on the Bus anyway) Madame Foster is no better and fails to hold up her end of the bargain simply because she found something of her own interest. Made all the worse when her friend Flo comes and chooses to wait longer despite promising Bloo they'd be going right after they payed to leave.
    • In "Crime after Crime" she acts like a hateful shrew and keeps berating Frankie for not getting "It" right. And then laughs at Bloo's agony when he's forced to eat the gross meal she made Frankie prepare. That line where she goes "it's not as bad as it looks, its much WORSE" just implies that she likes laughing at others misfortune.
    • In the Season 5 episode "Ticket to Rod" Madame Foster takes a massive Jerkass Ball moment toward, Mac, Frankie and Bloo. She basically teams up with Bloo and both of them sabotage Mac and Frankie simply to get the tickets to meet Rod Tango. Madame Foster is willing to sabotage Frankie her own granddaughter and shows absolutely no remorse for it. Madame Foster even states herself that she didn't regret doing it. Then later after Bloo is mean-spiritedly thrown out by Rod Tango himself Madame Foster just acts like a complete Jerkass toward Bloo and gets away with basically conning two people and literally dumping the other one simply to get her place to see Rod. It's basically them taking the ending of "Fosters Goes to Europe" and making it into a full episode.
  • Miniature Senior Citizens: She's even smaller than Mac.
  • Morality Pet: To her imaginary Mr. Herriman, in a sense. She's basically the only person who can convince Mr. Herriman to not be such an overbearing stickler for the rules.
  • Nice Girl: She's generally a friendly and good-natured person.
  • Out-of-Character Moment: Holds many of these throughout the show. See Jerkass Ball above.
  • Troll: While she's a very nice and wise person, she also deeply enjoys messing with people and watching chaos unfold. This in turn makes her have her Jerkass Ball moments. You can even consider some to be Out Of Character Moments.
  • Womanchild: Apparently, 80-something years old isn't too old for a babysitter.

Other Humans

    Goo Goo Ga Ga
At least she'll never misuse the Spore Creature Creator.

Voiced by: Grey DeLisle

An extremely talkative girl who has imagined LOTS of friends.

  • Adorkable: She's weird, silly, talkative, and sweet-natured.
  • Aerith and Bob: "Goo" alone is already an unusual name, but her very full name being the babbling of an infant is full-on embarrassing.
  • Attention Deficit... Ooh, Shiny!: She's even more easily distracted than Bloo is.
  • Ambiguous Disorder: She has a common tendency to get distracted, constantly change subjects, and can never turn off her Motor Mouth mode.
  • Break the Cutie: While she did deserve it to some extent due to how endlessly annoying she was, Mac's "Reason You Suck" Speech to her causes Goo to enter a state of depression and despair where she starts to create tears as imaginary friends.
  • Cheerful Child: Goo is very hyperactive and quick-witted.
  • Childish Tooth Gap: Has a notable gap in between her front teeth that epitomizes her childishness.
  • Cloudcuckoolander: She lives on a completely different plane of reality. It's partially because she was raised by Hippie Parents.
  • The Cutie: A cute little girl with endless curiosity, a Childish Tooth Gap, Youthful Freckles, and Girlish Pigtails.
  • Embarrassing First Name: Would you be okay with the fact that your name is "Goo?" Because apparently, she is.
  • Everything's Better with Rainbows: She seems to think so, what with her rainbow-colored outfits.
  • Friendless Background: The reason she makes up all of those imaginary friends.
    Goo: (after imagining a bunch of cute little tear drop friends) Do you know why I make up so many imaginary friends? Because I don't have any real friends.
  • Genki Girl: She's got way too much energy. She's almost at the level of Mac when he's had too much sugar.
  • Girlish Pigtails: She wears pigtails to portray her youth.
  • Ms. Imagination: Unlike Mac, she'll just create whatever imaginary friend comes to her mind. She later tries to put a stop to it, though she once made one to help Mr. Herriman, exactly as he asks for, by accident.
  • Motor Mouth: She constantly speaks a mile a minute.
  • Nice Girl: Once you look past her wackiness, she's very nice.
  • Nice Shoes: They're some kind of cross between clogs and cowboy boots.
  • Open-Minded Parent: Both her parents are stated to be this (and possibly Hippie Parents too). Could be seen as a deconstruction too; her parents are implied to be way too open-minded, as they not only let her choose her own name as a baby (which is why she's named "Goo Goo Ga Ga") and allows her to dream up all those imaginary friends because they don't want to "stifle her creative mind", even though this terribly burdens Foster's Home and keeps her from actually making friends with the ones she's already made.
  • Out of Focus: She appears the most in Season 4.
  • Reality Warper: In a way. Her imaginary friends are bound by whatever rules she makes for them, and the laws of physics will bend around them to make it so.
  • Savvy Guy, Energetic Girl: Energetic Girl to Mac's Savvy Guy. Goo is very hyperactive and idealistic, while Mac is a pragmatic Adorably Precocious Child.
  • Ship Tease: With Mac. Mac once held her hand to lead her out of Foster's, and she asked him slyly why he was doing that, which led many residents of Foster's to believe they were going steady, which Mac denies. This nearly gets Mac banned from Foster's since, as Frankie put it, "She only comes to see you and you won't tell her to leave."

Wait, stop! He just wants to punch you!

Voiced by: Tara Strong

Mac's evil 13-year old brother, and one of the antagonists of the series.

  • Aloof Big Brother: He and Mac are not very close to say the least.
  • Ambiguous Disorder: Due to his stupidity, combined with his sociopathic behavior, one can infer he has some sort of a mental illness.
  • Asshole Victim: He'll usually get what's coming to him in most episodes, and needless to say, he deserves it for being such an asshole.
  • Ax-Crazy: The way he bullies Mac goes well beyond sociopathic behavior.
  • Babysitter from Hell: He's supposed to be Mac's babysitter while their mother is gone. He's not a very good one, to say the least.
  • Big Bad Duumvirate: He teams up with Duchess in the first episode.
  • Big Brother Bully: Just click on the link and you'll see him in the image. He bullies Mac relentlessly. Their mom thinks it's because Mac is too kiddy, but he's probably just a jerk.
  • Bitch in Sheep's Clothing: In the Pilot episode, he fakes a Nice Guy ego in front of the Foster's staff to adopt Bloo, just to ruthlessly torment him and further psychologically scar Mac.
  • Butt-Monkey: He's usually the show's biggest slapstick magnet, which ultimately serves as karmic justice for his douchebaggery.
  • Cain and Abel: The sociopathic Cain to Mac's more humble Abel.
  • The Chew Toy: He usually meets his own end in a played-for-laughs kind of way, and due to dickish ways, he's such a totally deserving victim.
  • Closet Geek: He's a fan of The Loved and the Loveless.
  • Demoted to Extra: After playing a really important role in the series premiere, Terrence became more of a minor character as the series went on. It got to the point where he was eventually Out of Focus by the last two seasons that some viewers forgot that Mac even had a brother. Though considering that his voice actor Tara Strong has said that he was her least favorite character to do due to his gruff voice being such a strain on her vocal chords, his lack of appearances in the later half of the series was likely a result of that.
  • Disappeared Dad: No appearance or mention of his and Mac's father is ever made.
  • The Ditz: He's incredibly stupid. He can't even tell the difference between red and green.
  • Dumbass Teenage Son: Terrence is a total doofus, as referred to in-universe.
  • Dumb Muscle: Although appearing very skinny and weak, he's punched a hole in a wall, is able to carry Mac with one hand, and is able to get up with Eduardo, Wilt, Coco, Goo, and Bloo on his back.
  • Emotional Regression: Terrence behaves like a spoiled little boy whenever his mom finds out about his bullying of Mac.
  • Even Evil Has Standards: Hilariously subverted in the pilot episode. When he gives his speech to Duchess about how he's disgusted that Duchess would ever contemplate ridding Bloo out of existence for good, he unpredictably asks how she does it and is very eager to formulate the plan.
  • Evil Sounds Raspy: Terrence speaks in a very gruff voice.
  • Foolish Sibling, Responsible Sibling: The foolish to Mac's responsible. He's the Dumbass Teenage Son of the family while Mac is a precocious and responsible 8-year-old.
  • Gonk: The most visually unappealing character in the show, what with his crooked teeth and bad case of acne.
  • Guttural Growler: The main reason Tara Strong considers him her least favorite character to voice. His husky voice put a strain on her vocal cords.
  • Hate Sink: His entire existence pretty much hinges on how unpleasant he is.
  • Hidden Depths: Who'd have guessed that Terrence of all people would be a fan of The Loved and the Loveless?
  • Insufferable Imbecile: He's a sociopathic Jerkass who solely exists to ruthlessly torment his little brother. That aside, he's so incredibly stupid that he can't tell the difference between green and red, mistook Singapore, Malaysia, and Wisconsin as the same countries, and even has the people in his dreams speak in syllable-emphasized speech.
  • Jerkass: He's not a nice guy. And unlike most other unpleasant characters in the show, he has no redeeming qualities.
  • Laser-Guided Karma: In episodes where he plays a big role in, he would usually suffer a nasty fate, such as being attacked by the unicorns, swallowed and later spit out by an imaginary sea monster, getting chased by imaginary bees, and feeling the electric wrath of an Extremesaur and peeing himself afterward.
  • Laughably Evil: Terrence is an unrepentantly rude sociopath, but his stupidity makes his douchebag behavior hilarious to watch.
  • Lean and Mean: Although he's pretty strong for his size.
  • Leitmotif: He always has a metal theme play when he shows up.
  • Muscles Are Meaningless: Despite the fact that he's thin and spindly, he's much stronger than an average 13-year-old.
  • Out of Focus: In seasons five and six, he played a much less vital role.
  • Playing the Victim Card: Terrence behaves like a spoiled Momma's Boy whenever his mother walks in on him bullying of Mac. Unfortunately for him, his mother doesn't buy it.
  • Real Men Wear Pink: Despite his intimidating nature, he's shown to be a fan of soap operas.
  • Sensitive Guy and Manly Man: The manly to Mac's sensitive. Terrence is a physically aggressive Big Brother Bully while Mac is emotionally sensitive to his torment.
  • Spell My Name with an "S": His name is occasionally misspelled "Terrance".
  • The Sociopath: Just look at the ways he bullies Mac, and wanted to physically harm Bloo in the pilot episode "House of Bloos".
  • Teens Are Monsters: He's a teenager who bullies his little brother and in general is very unlikable.
  • Would Hurt a Child: He's physically bullied Mac on more than a few occasions, who's five times his junior.

    Mac's mom
A colleague of Sara Bellum, perhaps?

Voiced by: Grey Delisle

Mac's mother, who made him get rid of Bloo in the first place, but is unaware of his daily visits to Foster's. She works all day, and Mac hardly ever gets to see her.

  • Adults Are Useless: Zigzagged. Mac's mom is usually too busy to see Mac or deal with Terrence's bullying but unlike most cartoon moms, she's not oblivious to the abuse that Mac goes through, and tries to stop it. But to her, the problem is Bloo, and the series kicks off with her forcing Mac to get rid of Bloo. And the rest of series, she is completely unaware of the fact that Mac visits Bloo at Foster's everyday. The latter is more to do with the fact that Mac's afraid of how she'll react than anything else.
  • The Faceless: Her face is never shown.
  • Hartman Hips: She has a sizeable lower body.
  • Male Gaze: Enforced, as her face is never shown.
  • Out of Focus: She is not seen in seasons 2, 5, and 6 aside from being mentioned, she makes her last appearance in "I Only Have Surprise For You".
  • Parental Obliviousness: She doesn't notice that Mac goes to Foster's every day. Her having "a million jobs" partially justifies this, but there was a reason the show's writers got The Unintelligible Coco to explain how he convinced his mother to let him go on a TRIP TO EUROPE with people she's never met.
  • Well-Intentioned Extremist:
    • She tries to stop Terrance's abuse of Mac... By asking Mac to send away Bloo, who despite being imaginary is every bit as alive as his human companions.
    • When Duchess becomes their next-door neighbor and is too much for Mac's family to bear, she goes so far as to arrange for everyone to move to Singapore (at least, according to Terrence) just to get away from her.
  • When You Coming Home, Dad?: She hardly ever gets to see Mac, because she works all day every day.

     Kip Snip
Slimeball of the month, folks.

Voiced by: Tom Kenny

A greedy and devious Hollywood producer who tried to exploit Bloo for his own gain.
  • Con Man: The deodorant he cells is actually a phony.
  • Expy: Of Dick Hardly. Sleazy, blond, manipulative and sells poor products.
  • Horrible Hollywood: He's a Hollywood agent that was going to keep Bloo as his slave. It gets worse when it's revealed he didn't have Bloo sign an acting contract but adoption papers.
  • Laser-Guided Karma: After admitting on live TV that the deodorant he was selling actually made people smell worse, he's promptly arrested for false advertising, letting out a satisfying Big "NO!" as the police drag him away.
  • Manipulative Bastard: He takes advantage of Bloo's jealousy towards Eduardo for being in commercials.
  • Monster of the Week: Only appeared in "Sweet Stench Of Success" in which he was the main antagonist.
  • Sinister Shades: A Con Man who wears shades.

Imaginary Friends

  • Shadow Archetype: A more innocent example than most, but this is implied to be the case with all imaginary friends, to an extent: For example, Eduardo was imagined by Nina Valerosa to serve as her protector and playmate, but ended up unconsciously reflecting and amplifying her timid nature, becoming the scaredy-baby we all know and love. This led Nina to learn to stand up for him, and eventually herself.

Return to sender: insufficient postage to tolerate smell.

Voiced by: Candi Milo

A cheese-based imaginary friend with a childlike disposition; likes chocolate milk and cereal.

  • Ambiguous Disorder: At times, he acts as if he has a mental disability.
  • Annoying Younger Sibling: He acted like this to Bloo in his debut, annoying him with his idiocy, but he turns out not to be Bloo's brother when it's revealed that he is Louise's imaginary friend.
  • Cloudcuckoolander: He has a history of unusual behaviors.
  • The Ditz: Cheese is incredibly dumb.
  • Flanderization: From a "four-year-old with special needs" to "barely sentient baby", by only his second major appearance!
  • Genius Ditz: He has a good memory.
  • Meaningful Name: "Cheese" is an appropriate name for an imaginary friend who has a yellow complexion and an apparently unpleasant odor.
  • The Millstone: With the trouble he's known to inadvertently cause, it's a wonder why he's never turned away.
  • No Indoor Voice: When something upsets him, you'll know it. If fact, his role as an Assist Character in Cartoon Network: Punch Time Explosion is to traipse about shrieking at the top of his lungs!
  • Punny Name: A variant; cheese puns are invoked whenever he's paired with someone. "Mac and Cheese", "Bloo Cheese" and "Cheese Louise" are mentioned in his introductory episode.
  • Punctuated! For! Emphasis!:
    • "I. Like. Cereal."
    • "I! FOUND! A! CARROT!"
  • Red Eyes, Take Warning: Subverted. He's mostly harmless. At worst, he's just annoying.
  • Small, Annoying Creature: He's a short feller and he often annoys the other characters.
  • Sweet Tooth: He likes chocolate milk.
  • Talkative Loon: Prone to saying silly and weird statements at random. "I'm a horsey!"
  • The Thing That Would Not Leave: No matter how much they try, Fosters can never seem to get rid of him for too long. Even after getting two separate security systems to lock him out, he still finds his way in. Eventually transforms into the thing that can't leave, since he's sent to Foster's permanently after his creator, Louise, moves somewhere that doesn't allow imaginary friends, leaving Cheese to be a resident of Fosters.
  • Trademark Favorite Food: Chocolate milk... we think. He refers to every food as chocolate milk. Also seems to like cereal (we think?).

Don't let her get a copy of Yandere Simulator...

Voiced by: Grey DeLisle

A small, cute imaginary friend with a dangerously obsessive crush on Bloo.

    Duchess Diamond Persnickety, the First, Last, and Only
Truly one of a kind... we wish.

Voiced by: Grey DeLisle

An ugly, snobbish and downright mean aristocratic imaginary friend.

  • 0% Approval Rating: Not one person in the series likes her at all and she has been passed up for all adoptions except by the Applebees, who unfortunately live right next door to Mac.
  • Aristocrats Are Evil: It's not clear if she's actually a "duchess" or if it's just a name. She's definitely evil, though.
  • Art Initiates Life: Possibly, considering she looks like a Picasso painting. This may be intentional, as in the few instances where she shifts her pose she's shown to be completely flat as though she were an actual artpiece.
  • Big Bad Duumvirate: With Terrence in the first episode.
  • Entitled Bastard: Her morning routine provides a perfect example.
  • Fluffy Tamer: Can exert near-perfect control over an Extremosaur in the first episode. She speaks to it affectionately with Baby Talk to boot.
  • Hate Sink: Her entire purpose on the show is her being a spoiled snob who bosses the others around and has little respect for anyone around her.
  • It's All About Me: In the pilot, she plots to kill Bloo simply because the daughter of a rich family wanted him instead of her. That's pretty normal behavior for her.
  • Jerkass: She's such an unpleasant person that she makes Bloo look like a saint.
  • Karma Houdini: At best, Duchess doesn't get any sort of long-term adoption because of her Jerkass nature and the one time she does get adopted, it's a detriment to Mac's sanity. This in spite of the fact that the series' pilot has her trying to murder Bloo.
  • Pet the Dog: Even Duchess can't bring herself to hate Uncle Pockets. When Bloo interviewed her in the hopes of finding someone willing to slander him, she calmly replies "Eh, tolerable." Seems small, but coming from Duchess, that's a pretty big compliment.
  • Rich Bitch: She acts the part, but she's an imaginary friend so she doesn't have any real money.
  • Small Name, Big Ego: Her full, self-styled title is Her Royal Duchess Diamond Persnickety, the First, Last and Only. She clearly thinks way too much of herself.
  • Smug Snake: She thinks that she's perfection. Nothing could be further from the truth.
  • The Stool Pigeon: In the episode "Partying is Such a Sweet Soirée".
  • That Came Out Wrong: In the pilot, she suggests to Mac's brother Terrence that they work together, but the way she puts it grosses out Terrence because he mistakes it for Duchess coming on to him.
    Duchess: You and I should hook up!
    Terrence: Oh, man! I think I'm gonna be sick!

    Jackie Khones
He's got that look in his eye.

Voiced by: Phil La Marr

A small, green, furry imaginary friend with a deep voice, one eye, and a cool personality.

    Yogi Boo Boo
some caption text

A green imaginary friend who speaks in an Indian voice and is a vegetarian.

    Imaginary Man and Nemesister 

Voiced by: Daran Norris and Grey DeLisle

A superhero imaginary friend and his arch nemesis, a supervillainess imaginary friend. It turns out that they're actually siblings (er, rather, cousins), created by siblings as a fun outlet for their sibling rivalry.


  • Achilles' Heel: Nemesis' hair and Imaginary Man's masculinity.
  • Arch-Enemy: To each other. Though it's implied that it's all just a game.
  • Aw, Look! They Really Do Love Each Other: If anyone but each other attack them, they'll drop their act and become concerned for their safety.
  • Cain and Abel: Subverted. They don't hate each other, they just embody a childish sibling rivalry.
  • Kryptonite Factor: Anything that damages Imaginary Man's masculinity, though flowers are the most commonly exploited. On the flipside, Nemesis is weakened by anything that damages her hair.
  • Manchild: Both of them, behaving like stereotypical children of each gender despite having adult bodies.
  • Sibling Rivalry: Created through one, presumably to act as a more playful outlet to channel said rivalry.

Imaginary Man:

  • Catchphrase: As Mac constantly tries to come up with his own catchphrase as Imaginary Man's sidekick, Imaginary Man responds to the poor choices with, "keep trying Mac-Attack."
  • Flying Brick: Imaginary Man.
  • Gasshole: One of Imaginary Man's powers is the "Atomic Belch".
  • Hypocritical Heartwarming: Imaginary Man stopping Bloo from attacking Nemesis, because nobody pulls his Nemesister's hair but him!
  • Superheroes Wear Capes: Imaginary Man.
  • Wham Line:
    Imaginary Man: (after saving Nemesis from an angry Bloo) Nobody pulls my Nemesister's hair but ME!



Voiced by Max Burkholder

An imaginary friend connected to another dimension connected to a toy chest. He's terribly lonely and abducts Frankie to be his friend.

Nerd rage, thy name is Bendy.

Voiced by Jeff Bennett

Bendy is an imaginary friend who is yellow with black stripes. He was brought to the house after his child's parents couldn't take his trouble making anymore. Frankie and Mr. Herriman thought that it might just be his kid blaming him which is apparently very common, but in truth it really was Bendy.
  • Bitch in Sheep's Clothing: In front of Frankie and Mr. Herriman, he puts on the mask of being a misunderstood and sympathetic Nice Guy who's always being blamed for other people's misbehavior, but takes great relish in framing others for his bad deeds when they aren't around.
  • Crocodile Tears: Used these to manipulate Frankie and Mr. Herriman.
  • Hate Sink: Downplayed example. He was simply added in the episode he appears in just to be despised by the audience for his behavior. However, the hate he received was far beyond what was intended to be since he became a Karma Houdini at the end, thus causing him to border on full-on Scrappy territory.
  • Jerkass: Did nothing but cause havoc in the home and framed Bloo and his friends for it.
  • Karma Houdini: One of the most infamous examples in the series. Despite Bloo and his friends fighting tooth and nail to catch him, he gets away in the end when Bloo reveals that he planned to get Bendy in trouble. However, since he doesn't appear in any other episodes, one can assume he was eventually found out and was kicked out offscreen.
  • Kick the Dog: Bendy telling Bloo that he knowingly used his toothbrush to scrub the toilet.
  • Monster of the Week: He only appeared in the episode "Everyone Knows It's Bendy", where he was the antagonist.
  • Pet the Dog: Despite being an atomic asshole, he did sign the "Goodbye, Mac" card.
  • Playing the Victim Card: He frames the imaginary friends for his own actions.
  • Put on a Bus: Understandably, the above tropes ensured that this was his fate as the audience was all too eager to see him gone.

     Goofball John McGee

Voiced by Tom Kenny

A boy posing as an imaginary friend to mooch off of Foster's. Except not really — he actually is an imaginary friend.

  • Ambiguously Human: Parodied, and rather poorly at that. The episode hammers in Frankie's suspicion that he is a human so much that after a while, the twist that he's actually an imaginary friend becomes painfully obvious.
  • Canada, Eh?: He hails from Canada, and has a subtle accent to match.
  • Cloudcuckoolander: His speech patterns are more than a little bit odd, even disregarding the fact that he's really an imaginary friend.
  • Deadpan Snarker: He's a laid-back slacker who's prone to making smarmy quips.
  • Gag Nose: Zig-zagged. At first, it appears that he just has a pointy nose with a clown nose on it. Underneath the clown nose, he has a small elephant's trunk.
  • Jerk with a Heart of Gold: Despite being a lazy, obnoxious slacker, he turns out to be at least nice enough to give Frankie some genuine gratitude for taking care of him at the end of the episode. Considering how thankless Frankie's job usually is on top of what she had to put up with in his debut, it's understandable that she looks more than a little touched at that statement.
  • Karma Houdini: Despite all the trouble he causes with Frankie, the episode ends with an Everybody Laughs Ending, even though he made a ton of extra work for Frankie, caused her to miss a concert that she was really looking forward to, and then had the gall to take everyone else to the place, but because he's an imaginary friend it seems like he's never told to make amends.
  • Lazy Bum: He's a huge slacker, much to Frankie's dismay, as she has to clean up after him.
  • Paper-Thin Disguise: Subverted. At first, it seems he's just a human teenager wearing a clown get-up, and the only one who doesn't buy him being an imaginary friend is Frankie. Turns out, he's an actual imaginary friend, just one that looks a little too much like a human.

     Uncle Pockets

Voiced by Kevin Michael Richardson

The best imaginary friend ever who was the first one to be put into Foster's.

Alternative Title(s): Destination Imagination


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