Characters / Foster's Home for Imaginary Friends: Main Characters

Foster's Home for Imaginary Friends Main Character Index
Main Characters | Other Characters

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Protagonists:

Blooregard "Bloo" Q. Kazoo

Blooregard "Bloo" Q. Kazoo

We'd tell him to get a clue, but he'd have Wilt do it for him instead.

Voiced in English by: Keith Ferguson
Voiced in Japanese by: Noriaki Sugiyama
Voiced in Latin America by: Noé Velázquez
Voiced in Hebrew by: Ami Mandelman
Voiced in Romanian by: Richard Balint
Voiced in Swedish by: Nick Atkinson

One of the two main protagonists of the show. Mac's energetic, hyperactive imaginary friend and complete opposite; without Bloo, Mac would do everything he says and does.

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• Accidental Misnaming: In "Berry Scary", he constantly gets Berry's name wrong, which was even used as The Stinger for the episode. He calls her "Terry", "Cherry", "Jerry", "Mary", "Carrie", "Larry", and "Heather".
• 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 had everyone arrested for trespassing. Everyone was released in the morning, leading to Bloo 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.
• Aesop Amnesia: Due to his general immaturity, Bloo never seems to learn his lesson from anything.
• 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 definitely checks out a lot of boxes on how not to behave - he's whiny, selfish, narcissistic, smart-alecky and rude; he causes annoyance and inconvenience for others, finds loopholes around everything, is willing to throw others under the bus for his actions, and is not the most loyal friend. Seeing as Mac imagined Bloo when he was 3 years old, it can be clear that his behavior still imitates Mac's own around that time and that Bloo hasn't matured since then, thus serving as an In-Universe example of this to Mac.
• Arch-Enemy: To Terrence, Mac's Big Brother Bully who he's had to fend off for five years. Also to Kip Snip, the Hate Sink Hollywood agent who incessantly exploits him in "The Sweet Stench of Success".
• Asshole Victim: Whenever Bloo meets his own end, his jerkish tendencies are usually the reason why he does.
• Attention Deficit... Ooh, Shiny!: If you 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. Whole episodes have been dedicated to Bloo undermining someone more popular than him.
• 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 still loves Mac dearly. He will often 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.
• Blue Is Heroic: Downplayed. He is often selfish, rude, and arrogant, but still a good person deep down.
• Bratty Half-Pint: He's a VERY whiny nuisance and will almost always complain when he doesn't get his way.
• Brilliant, but Lazy: Bloo can actually be pretty cunning and intelligent but will only ever direct these qualities to whatever whim crosses his mind at the time so he rarely employs them for something productive.
• The Bully: Sometimes. He can be quite domineering to others, even to Mac. He can especially be quite mean to Eduardo at times.
• 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. He becomes more of a jerk in season 1, but still retains most of the qualities that make him likable. Come season 3, however, Flanderization is in full effect.
• 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 was back in "My So Called Wife".
• Everyone Has Standards:
  • Bloo may be a jerk, but even he can't stand how snooty and bitchy Duchess is.
  • There is one firm line Bloo absolutely avoids crossing if he can help it; he abjectly refuses to be anyone's Imaginary Friend but Mac's and dreads the very idea of adoption. He may not always show it but Bloo loves his creator dearly and can not live with the idea of being someone else's Imaginary Friend.
  • He absolutely loses it in "The Sweet Stench of Success" when Kip Snip, a Hollywood agent who he signs a "contract" to in promises of making him a star, constantly exploits Bloo for commercials and gigs, doesn't allow him food, and makes him sleep in a cage. Not that Bloo could do much against Kip Snip until his friends saved him, since Kip Snip revealed the "contract" Bloo signed were actually adoption papers.
  • Bloo may be selfish, but when he learns Ivan’s creator is blind and needs him to act as his seeing friend, like Mac, Bloo waste no time in finding Ivan quickly.
• Flanderization: He started out being very protective of Mac in the Pilot, then became more of a Jerk with a Heart of Gold in the first two seasons. Starting in season 3, however, his jerkish tendencies are played up a lot more frequently.
• The Friend Nobody Likes: Mac (his creator) genuinely likes him; at best, the others tolerate him when he's not being a huge jerk.
• The Gadfly: Bloo provokes others for fun.
• Genius Ditz: Although Bloo is immature and lacks common sense, he's still too clever for his own good when it comes to finding loopholes and manipulating others to get what he wants.
• Green-Eyed Monster: Bloo couldn't stand Uncle Pockets getting all the attention and recognition especially the title 'best imaginary friend' that he tries to smear him and find any secret he is hiding.
• Heterosexual Life-Partners: With Mac. While they squabble a lot, their lives would be nothing without each other.
• Hidden Depths:
  • For the imaginary friend of a child, Bloo is capable of impressive feats such as working vehicles and advanced equipment despite his usual stupidity and small size, seems to have a surprisingly empathetic understanding of a limited number of people (albeit in troublesome spots, like the implication that he's been to jail enough to know the local guard), and for all the carnage he causes he can clean a place thoroughly and utterly like a consummate professional.
  • Bloo is consistently shown to be an amazing showman, something that adds to his appeal as an Imaginary Friend. His insane popularity in "The Sweet Stench of Success" can be attributed to how well he can dazzle audiences.
• Hidden Heart of Gold:
  • In "Go Goo Go", after Mac (who was blamed for Bloo disregarding the rules of not allowing Goo into Foster's) is told by Frankie and Mr. Herriman that he's no longer welcomed at Fosters, everyone else on the bus gives Mac a sympathetic look... but Bloo's expression to Mac shows he is truly sorry. Additionally, while everyone else at Foster's is annoyed by Goo's hyperactivity, Bloo is the first person to be genuinely nice to her.
  • In ""Read 'Em and Weep", when he thought that Eduardo had died he was devastated, and said nobody else deserved to be him. When Eduardo comes back to Foster's, he acts like a jerk (and outright tells him he was disposing of his old fur coat), but the moment everybody else enters Fosters and leave Bloo and Eduardo alone, Bloo hugs Eduardo, telling him a genuine and heartfelt "Welcome back".
• Hypocrite: Throughout "Store Wars", Bloo berates Coco for not having any money, despite the fact that Bloo himself is poor; the money he had was actually from his friends.
• Idiot Hero: More ignorant than outright stupid.
• Innocently Insensitive: Bloo's far from being innocent and becomes a progressively bigger jerk to others up until near the end, but Word of God from Craig McCracken (as seen in a series of tweets) is that Bloo simply doesn't always understand just how selfish or mean-spirited his actions and behavior can actually be, let alone the potential consequences of them, much like a very young or immature kid - only near the finale does he actually start to become aware of it. Additionally, Bloo was imagined by Mac when the latter was 3 years old, meaning Bloo never matured like Mac did and was still trying to entertain that little kid the only way he knew.
• Insane Troll Logic: Bloo frequently tries to incorporate screwed-up logic into situations to excuse his actions.
• Insufferable Imbecile: Played with. He's more ignorant than outright dumb, but he's still reckless, immature, and rude in contrast to Mac who is wiser, mature, and nicer.
• It's All About Me: Frequently prone to wondering aloud why no one is focusing on him. Doubles as Attention Whore.
• 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.
  • In "Eddie Monster" and "Destination Imagination", while Bloo was being mean, he's not wrong that Eduardo truly is such a 'big scaredy baby' that even the smallest inanimate things like a whisbee freak him out, thinking it's going to eat him. Ironically, Eduardo doesn't want to be treated as such, but him behaving as such makes it hard for Bloo to not do so especially that Eduardo doesn't help his case most of the time. It's also quite telling that Mac, Coco, and Wilt were awkwardly quiet when Eduardo tries to get them to back him up showing that they secretly agree with Bloo.
• 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. Earlier in the show he is also shocked and remorseful, when he finds out Coco's baseball cards describe him as a "big insensitive jerkface" in "Cuckoo for Coco Cards".
• Jerk with a Heart of Gold: The "Jerk" part is justified. The TV movie "Good Wilt Hunting" implies the "negative" aspects of the imaginary friends are an unconscious Secret Test of Character for the kids that imagined them; thus, Bloo's definitely noticeable negative qualities (that become more pronounced with each season) show Mac how not to treat not just his friends, but everybody. However, he sometimes doesn't understand just how obnoxious, mean-spirited and selfish he can be, and he starts to level off near the end of the series. Additionally, he still loves the very child that imagined him, Mac (though how much sometimes depends on the writer). He also cares for his friends despite how he usually treats them.
• Jerk with a Heart of Jerk: Usually, whenever he helps out his friends, there's some shallow, selfish motives behind his actions. Not that his friends don't realize that, but still.
• Karma Houdini: Bloo usually gets scot-free out of the trouble he causes. Notable examples include:
  • In "Bus the Two of Us", Bloo steals Foster's bus and commits several crimes. At the end, a Bloo clone Goo imagined is getting chewed out by Frankie for all the trouble Bloo caused, but the real Bloo sneaks off with the bus again.
  • Although in "Go Goo Go" he feels downright awful for Mac no longer being allowed at Fosters, it's never discovered it was Bloo who let Goo back into Foster's.
• 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.
• Karmic Butt-Monkey: Whenever karma catches up to him, he gets bulldozed over by many 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.
• Keet: A very exaggerated example. He is a self-centered jerk but at the same time, he's energetic and hyperactive.
• Know-Nothing Know-It-All: Constantly insists that he's right about everything, when in reality he's very ignorant.
• Lack of Empathy: Zig-zagged. Bloo usually displays little regard to the feelings and well-being of others during his schemes, but in some episodes, something causes him to have a (temporary) change of heart.
• Large Ham: He's pretty dramatic at times, especially when he wants to get his way.
• 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 serve as the catalyst for his comeuppance. 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.
• 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, you have to give the clever boy credit for constantly finding his way out of it.
• Manchild: While he's technically 5 years old, he's presumably older 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 and his actual knowledge, but Bloo's silver tongue and craftiness are two 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.
• Mysterious Middle Initial: It's never stated what the "Q" stands for.
• The Napoleon: He always tries to assert his dominance to others bigger than him. Emphasis on "try", as it does backfire on occasion.
• Narcissist: Bloo is self-centered and he constantly looks down on others.
• Never My Fault: Although Bloo sometimes takes accountability for his actions, he 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.
• 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, Bloo will sometimes show the soft side he had in earlier seasons, such as apologizing to Coco after realizing how much of a jerk he acted as in "Cuckoo for Coco Cards", missing Coco, Eduardo, and Wilt when they all move out of the room in the end of "Room with a Feud", or welcoming Eduardo back to Fosters in "Read 'Em and Weep".
• 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.
• 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).
• Ridiculously Cute Critter: As Madame Foster pointed out in the pilot episode, Bloo's design is unique yet simple and is absolutely adorable. This makes him one of the most wanted imaginary friends at Foster's, and it's been shown that Bloo is at risk of being immediately adopted if Mac is even slightly late with his daily visits. In fact, one of the old Cartoon Network online games ("A Friend in Need") involves the other imaginary friends throwing Bloo back and forth to keep him out of the hands of a bratty girl who wants to adopt him and rename him "Tiffany".
• Right for the Wrong Reasons: In "Bloo Done It", Bloo got jealous and suspicious of an imaginary friend named Uncle Pockets as believed that he was hiding something. Bloo suspected Uncle Pockets' kindness was a front to hide some nefarious secret. Although Uncle Pockets turned out to be genuinely kind, Bloo was right about him hiding something, as he buried a chest filled with memorabilia of the many children who adopted him, as he couldn't let go of all the good times and move on. This made Uncle Pockets look even sweeter, much to the latter's annoyance.
• 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 plans to satisfy his own self-centered interests and goals, though they typically fail.
• 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 jerkish companion Bloo.
• Ship Tease: With Goo, played for laughs. In "Go Goo Go", while Frankie mistakenly believes Mac has a crush on Goo, Bloo is very excited to hang out with her, treats her especially nicely compared to everyone else, and giggles uncontrollably whenever she's nearby (it takes her third appearance for the giggling to go away entirely).
• 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. However, due to his selfishness, it was Mac who shared this knowledge with the rest of the house.
• Smug Snake: Bloo 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...even though his schemes usually backfire. Again, this is a result of his immaturity.
• 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.
• Token Evil Teammate: Not evil per se, But he seems to be the only one out of the main cast to consistently be selfish, antagonistic, and troublemaking.
• Took a Level in Dumbass: As the series progressed, Bloo went from a relatively clever troublemaker to an absent-minded moron who has hare-brained ideas at best, to a loose grip on reality at worst.
• Took a Level in Jerkass: After the pilot episode, Bloo took about one or two per episode, and around four or so each new season.
• Toxic Friend Influence: It's Bloo's mischievous advice that often leads Mac into trouble.
• Trademark Favorite Food: Pizza. He orders it frequently and he eats or mentions pizza more often than other foods.
• The Troublemaker: Blooregard "Bloo" Q. Kazoo is Mac's imaginary friend and the one who causes the most trouble among the main quartet of himself, Wilt, Coco, and Eduardo. Best exemplified in "Setting a President", when Bloo nominates himself as a candidate for the President of Foster's in the election against Frankie and Mr. Herriman, Mac brings up many of the bad things that Bloo has done in the past, all of which were the plots of previous episodes. These include destroying Madame Foster's bust, opening the secret door that housed the Scribbles, uploading an embarrassing video of Mr. Herriman to the internet, flooding the house, throwing a wild party against Madame Foster's wishes, sabotaging Frankie's date, destroying a beloved elephant squeak toy, ruining Mac's reputation at school, and blowing the roof off the house.
• Tsundere: A MAJOR Harsh type. His nice side only comes out with Mac most of the time, and only if prompted.
• Unsympathetic Comedy Protagonist: Each episode where Bloo schemes up something makes it clear he's not really worth rooting for any time he suffers. Despite this, his jerkish personality is clearly meant to be funny and make one root for him anyway.
• Vague Age: Bloo was imagined by Mac when he was 3 years old, meaning that the former is around 5 years old, as seen in one episode; while it isn't clear if or how age affects an Imaginary Friend, this furthers curiosity as he sounds like a teenager and can be as clever as adult, yet his inherited immaturity from a younger Mac is the reason why he behaves like child.
• Villain Protagonist: In the later seasons, his schemes become borderline sociopathic.
• Vitriolic Best Buds: With Mac. Not in the pilot, but in the rest of the series.
• Vocal Evolution: His voice got more nasally and whiny as the series went on - coincidentally, he also became more of a jerk.
• 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. Despite this, it's implied he at least cares for them (especially Mac), and they also do the same in return.

Mac

Mac:

This is one of those people who you should never, ever give sugar to.

Voiced by: Sean Marquette (series), Grey DeLisle (Cartoon Network: Punch Time Explosion)

One of the two main protagonists of the show. Mac is a creative, smart, and very warm-hearted 8-year-old. Bloo is his imaginary friend and his complete polar opposite, though they've been as close as can be their entire lives despite their differences.

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• 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.
• All-Loving Hero: He's friendly and compassionate with just about everyone. The only exceptions are his brother Terrance, Duchess, and Berry.
• Author Avatar: Craig McCracken based Mac on himself as a child. His family actually noted on it.
• 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.
• Brainy Brunette: He's got a head of brown hair and is quite intelligent and responsible for a boy his age.
• 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.
• Child Prodigy: For an 8-year-old boy, Mac is unusually perceptive, serious, smart and intelligent.
• 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.
• Death Glare: Gives one to Mr. Herriman in "Let Your Hare Down" for being overbearingly unsympathetic and strict about letting Bloo being adopted just because he was a few minutes late.
• Disappeared Dad: We never see or hear anything about Mac's dad (the pitch bible says his parents are divorced)—the only relatives of Mac's that we see are his older brother and their mom.
• 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.
• 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.
• Mature Younger Sibling: Despite being eight years old, he's more down-to-earth than his 13-year-old brother Terrence, usually outsmarting him in their arguments, and to top it off their mother trusts Mac more than Terrence, since the latter is too stupid to uphold any responsibilities.
• 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 the 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 One Name: We never find out Mac's last name.
• 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 merchandise released while the show was on. Frequently he would be left off licensed clothes and accessories in favor of Cheese. Averted with merchandise released after the show ended, where he's just as prominent as the rest of the main cast.
• 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: Mac's only 8 and he's established as having a crush on Frankie (who's at least fourteen years older than him).
• 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 Is Heroic: He wears a red shirt and is a nice person.
• 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.
• Sanity Slippage: You guessed it: his hyperactive response to sugar.
• 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 jerk. 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.
• Series Continuity Error: In "The Big Squeeze" he's seen eating a large number of sugary foods with Bloo when the house is left abandoned (due to everyone not wanting Bloo to ruin their beach trip), yet he never goes into a sugar craze, and in fact suffers a Food Coma instead. Though it is possible that he simply was picking the sugar-free versions of the items he consumed (whipped cream, jelly, ice cream, etc).
• She's Not My Girlfriend: Says this regarding Goo.
• Ship Tease: With Goo in "Go Goo Go". He 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." That episode was even called "The Dreamy Girlfriend" in Japan.
• Shrinking Violet: Comparably less shy than most examples, but he's still pretty introverted for someone his age.
• Sibling Rivalry: Taken to extremes with Terrence.
• Straight Man: Mac is the voice of reason for Bloo.
• Strong Family Resemblance: Mac clearly takes after his mother, donning the same hair as her. From this it can be assumed that Terrence took after his and Mac's Disappeared Dad who presumably had black hair.
• 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.
• Trademark Favorite Food: Besides the obvious, his favorite sandwich is bologna.
• Vitriolic Best Buds: With Bloo. Not in the pilot, but in the rest of the series. They frequently argue and Bloo has his moments of being pretty mean to him sometimes, but they're still best friends and care about each other more than anything else.
• Vocal Evolution: His voice gets lower and somewhat scratchy after a while, due to his voice actor hitting puberty. It starts to change toward the end of season one and changes completely by season three. His voice is also lower than usual in the In-Character Commentary for "Store Wars" on the season one DVD, due to his voice not being digitally pitched up like in the show.
• Wedgie: Gets one from Terrence.
• 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 some growth spurts.

Other main characters:

Wilt

Wilt

Nothin' but net.

Voiced by: Phil LaMarr

A lofty, one-armed imaginary friend who loves sports and tries his best to be nice to everyone and gain acceptance from his peers. Is that okay?

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• Accessory-Wearing Cartoon Animal: He walks around with just shoes and socks on his feet and a wristband on his right wrist. A flashback to before he lost his left arm likewise has a matching wristband on that wrist. He even mentions this to Eduardo in "Land of the Flea" when the latter feels embarrassed for being naked after Bloo shaves his fur off to make a robe because it has fleas on it.
• 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: One can say he's a bit too polite. A lot of his dialogue starts with "I'm sorry, but that is not okay!" or at least some variation of "I'm sorry, but....". When he is reunited with his creator, Jordan, he tells out that he needs to quit saying he is sorry.
• Berserk Button: To say Wilt is not a fan of height jokes would be a gross understatement. The usually apologetic and outgoing guy wishes for Bloo to get beat up, to Bloo's face, because Bloo told a bad one in passing to a newcomer in "Beat With a Shtick".
• 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.
• Character Catchphrase: "Is that okay?" and "Sorry!"
• 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.
• Dudley Do-Right Stops to Help: He often stops whatever he's doing to help someone in need. This often causes him to miss things he wants to do. In "Where There's a Wilt, There's a Way", he ends up missing a basketball game due to having spent the whole day helping his friends with their needs, and in "Good Wilt Hunting", he ends up taking a few detours in his quest to to find his creator, Jordan Michaels, as a result of helping those in need, and the rest of his friends from Foster's keep losing track of him when they follow him.
• 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.
• Eye Scream: Wilt's left eye doesn't work, the eyeball just rattles around, and he can't move the bent stalk like his right eye. It's established in "Good Wilt Hunting" that he lost the eye in the same game he lost the arm. After the arm was crushed, the ball fell and struck his eye stalk, damaging it.
• Fashionable Asymmetry: Wilt is missing his left arm, and his left eye is small and deadened compared to his right. He wasn't imagined this way, though; it came about as a result of having his arm crushed by Foul Larry landing on it, as well as a basketball hitting the eye directly.
• Fatal Flaw: His inability to say "no" makes him an Extreme Doormat as his niceness is often exploited.
• Freudian Excuse: Poor Wilt. His backstory includes letting down his creator during the most important basketball game of his childhood. He felt terrible about it for 30 years and left his creator thinking he is better off without him. This may explain why Wilt apologizes for everything even if it is nothing to be sorry for.
• 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. He lost his left arm, his left eye, and the game in the process of saving a life.
• Jerkass Ball: While normally the nicest guy in the show, the prospect of a room that actually accomodates his height in "Room with a Feud" causes him to grow notably more spiteful and selfish.
• Lovable Jock: Basketball is his biggest passion in life, and he's one of the sweetest, nicest imaginary friends.
• 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: He's named after the famously tall Wilt Chamberlain, which refers to his love for basketball and being a Gentle Giant.
• Nice Guy: Probably the most pleasant, nicest, polite, helpful, and good-hearted character in the series. His caring nature is somewhat deconstructed in the episode "Where There's A Wilt, There's A Way" as his niceness is constantly exploited and Wilt had to hold a lot of stress in due to his inability to say "No" until he finally lashes it out near the end of the episode.
• 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 (lampshaded in that even he's surprised to feel that way about it). 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.
• Red Is Heroic: He's red and a friendly fellow.
• Scars Are Forever: As a result of a Heroic Sacrifice he made when he and his creator were younger.
• Sensitive Guy and Manly Man: Wilt is the confident manly to Eduardo's easily scared sensitive.
• Tall Is Intimidating: Occationally is a problem for him, but given he is a doormat it doesn't amount to much.

Eduardo

Eduardo

It'll be okay, big guy...

Voiced by: Tom Kenny

A huge, furry imaginary friend who has an infantile mind and is scared of everything. Despite his anxiety issues, he's sweet as pie and will go out of his way to protect his friends through any means when he's pushed too far.

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• 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 creator 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: Nina's wish to have an imaginary friend as a protector backfired. Instead of teasing her, the bullies started to attack Ed, who was too cowardly to defend himself, despite his looks.^note She eventually got sick of it and lashed out the bullies in return, and began to protect Ed instead of vice versa. 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.
• Dumb Muscle: He can be this in some episodes. He shares the same idiotic hobbies and is similar to Dr. Zoldberg from Futurama.
• 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 swarm 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. Inverted in the Latin American Spanish dub, where this is switched for Gratuitous English with an American accent instead, in an attempt to Keep It Foreign.
• Half-Dressed Cartoon Animal: A pair of pants and no shirt is Eduardo's usual state of dress and attire.
• 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.
• Modesty Towel: Has one on throughout the majority of "The Big Cheese", as he was bathing at the time everyone was forced to go outside to test the new security system.
• Naked People Are Funny: Out of the main cast (well, the ones who wears clothes, at least), he's been naked the most. In "Land of the Flea", he is shaved and left furless and naked by Bloo. In "The Big Cheese", he loses his Modesty Towel just as the local news station arrives at the house. And in "Cheese a Go-Go", his belt gets unbuckled by Bloo, causing his pants to fall down. Of course, being a kids show, Barbie Doll Anatomy is in full effect here.
• 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.
• Prone to Tears: He's a Lovable Coward, it's part of the territory.
• Purple Is Powerful: He's a purple monster, yet is very strong.
• 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 "The Buck Swaps Here" that Eduardo has a safe full of riches he keeps in his toy chest. Turns out he's made a lot of smart investments.
• Secret Test of Character: Like his creator claims when she says that imaginary friends don't just fulfill your wants but your needs, she realized that she didn't just create Eduardo to protect her but to help her learn to be brave.
• Sensitive Guy and Manly Man: Eduardo is the easily scared sensitive to Wilt's confident manly.
• Super-Strength: He is capable of carrying a bus around as if it wasn't even there. Though considering his size...
• Tall Is Intimidating: Combined with his scary face, Edwardo comes across as extremely intimidating to various characters when they first meet him, at least until they find out he is a big softy.
• 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.

Coco

Coco

Coco coco coco coco coco coco coco coco! Coco!

Voiced by: Candi Milo

A bird-like imaginary friend who's able to lay an infinite amount of colorful plastic eggs that can hatch into absolutely anything. However, she can only say and write her own name (or variations thereof) and exists in her own universe independent from the other imaginary friends and humans, but she's very amiable and much, much smarter than she lets on.

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• 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.
• Bilingual Dialogue: She'll talk in her Pokémon Speak, the characters will respond with normal language.
• Birds of a Feather: Literally with Goo, as they're both Cloudcuckoolanders with a love for strange things.
• Cargo Ship: In-universe; she's shown affection towards a lamp and a mop.
• Characterization Marches On: In the pilot movie, Wilt says she lays eggs when she gets excited. In the show proper, she does it basically whenever she wants.
• Cloudcuckoolander: She has pretty strange beliefs and quirks, like the aforementioned falling for a lamp and mop.
• Crazy-Prepared: In the event of an emergency, Coco's eggs will always contain whatever her friends might need to help in that situation.
• 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 deserted island. This explains Coco's hodgepodge 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.
• A Day in the Limelight: Two: "Cuckoo for Coco Cards" and "Mondo Coco".
• Ditzy Genius: Coco has the ability to lay eggs that contain anything she imagines, and she has a fairly logical and strategic mindset when it comes to emergencies. When there's a problem that needs solving, her eggs more often than not hatch into things she and her friends might need to solve that problem. However, she's very eccentric and has a medley of unusual quirks of her own.
• Go Mad from the Isolation: According to Word of God, Coco is so strange because her creator wasn't mentally all there when imagining her, after being stranded on a deserted island for an unknown length of time as the result of a plane crash.
• 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 taken 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, and she deeply cares for her friends too.
• Intelligible Unintelligible: Zig-zagged. While the audience can't understand her, the main cast usually can, but there are times where they don't know what she's saying either.
• Interspecies Romance: She briefly shacks up with a yeti in "Mondo Coco".
• Ironic Fear: Subverted. Coco's fear of flying might seem nonsensical, and the irony gets lampshaded...but then you remember that she's a flightless bird.
• 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.
• Prone to Tears: Not quite to the extent of Eduardo, but she is noticeably sensitive and can have her feelings hurt fairly easily. "A Lost Claus", "Cuckoo for Coco Cards", and "The Big Picture" provide perfect examples of this.
• 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 (besides World).
• The Smart Girl: Coco may be rather eccentric, but she is by and large the cleverest person in Mac's friend group. Quite often, she'll intelligently use whatever comes out of her eggs to solve any problem.
• Wings Do Nothing: Coco's wings are short and stubby and don't even have Feather Fingers. The pilot has her trying to fly briefly, but she quickly ends up falling.

Francis "Frankie" Foster

Francis "Frankie" Foster

"She's been wearing that same frumpy sweatshirt every day for a year!"

Voiced by: Grey DeLisle

The granddaughter of Madame Foster who serves as the caretaker at the mansion and the voice of reason amongst the staff.

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• Alliterative Name: Francis 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 paycheck is actually larger than Mr. Herriman's.
• Author Avatar: Inverted. Frankie's character is based on Craig McCracken's wife, Lauren Faust. This explains why Mac, the avatar for McCracken himself, has it hard for Frankie.
• 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 referring to Frankie as his "property".
• Big Eater: Once she finally has as much of Madame Foster's cookies as she can eat, she puts it away for months and eventually gets really fat (for for the end of an episode, at least).
• 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.
• Brief Accent Imitation: In "House of Bloos", she tells Mr. Herriman to come to his office by mocking how he usually summons her, complete with putting on a stuffy British accent.
• 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 whenever 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 it 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 has a pretty dry and sarcastic wit, especially when it comes to Mr. Herriman's bossiness, Duchess's demands, and Bloo being a pain in general.
• Do Not Call Me "Paul": She doesn't like being referred to by her real first name, "Francis," though that could be limited to Mr. Herriman being the only one to call her by it.
• 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, otherwise Frankie gains a big Balloon Belly.
• 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.
• Ms. Fanservice: Downplayed. Frankie is pretty but doesn't really have many fanservice-y elements to her apart from a midriff-exposing outfit.
• Morality Pet: To World in "Destination Imagination". He has a major case of abandonment issues and an incredibly short fuse, but he never blows up at Frankie, and the one time he almost does, she calms him down.
• Nice Girl: Frankie is a kind-hearted, smart, well-meaning, and caring woman whenever she's not taking crap from Mr. Herriman, Duchess, or Bloo.
• Noodle People: She's quite thin and tall, and has very skinny limbs.
• 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 calls Frankie his "property" 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 that causes Frankie's belly to swell by the end of Cookie Dough.
• Oblivious to Love: She seems unaware of Mac's obvious mad crush on her. However in the episode where Mac is dared to admit he loves Frankie, she actually is deeply touched and flattered.
• 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.
• Servile Snarker: She does what Mr. Herriman asks of her, but not without snarking about him ordering her around and complaining about how she does her work.
• 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 of 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.
• Team Mom: Of the main characters, she's easily the one who's the maternal, especially to some of the younger friends. That said, there are some friends (such as Bloo or Cheese) that she has to take a much firmer hand with.
• Tomboyish Name: Francis "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." She winds up gaining a lot of weight over the next few months as a result.

Mr. Herriman

Mr. 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.

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• Antiquated Linguistics: He talks like a 19th Century English gentleman.
• 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.
• Cold Turkeys Are Everywhere: His addiction to carrots.
• Dub Name Change: His name was translated as "Señor Conejo" ("Mr. 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 reveals that the reason he's obsessed with things being neat and tidy is because Madame Foster once blamed him for a mess she made and he didn't want to get into trouble by continuing to neglect messes.
• Furry Reminder: Besides the Stock Animal Diet, he's also terrified of dogs, which real rabbits are.
• 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.
• Half-Dressed Cartoon Animal: Wears a suit with a necktie, but lacks any pants. This is even lampshaded in "Adoptcalypse Now".
• Hero Antagonist: His desire to enforce the rules and keep the order of Foster's Home puts him in conflict with Bloo more often than not.
• High-Class Glass: His monocle.
• I Can't Believe It's Not Heroin!: Carrots of course. The desire can get so bad that he's willing to steal them.
• Insistent Terminology: He refers to everyone by their given name instead of their nickname, though only Frankie seems to take any noticeable annoyance to this.
• Jerkass Has a Point: He can be very strict on Bloo, but he does cause a lot of trouble around the house.
• Jerkass to One: While he's uptight and fairly strict, he still makes an effort to be polite to others. The exception is Bloo, making little secret of how much he dislikes him. This is partly because of how troublesome Bloo can be, and partly because he's annoyed that Bloo can't be put up for adoption unless Mac stops visiting him.
• 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.
• 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.
  • In "Duchess of Wails", he's the first character to announce/celebrate Duchess's adoption. He even had an emergency Surprise Party prepared for the occasion.
  • In "One False Movie", he joins the others laughing as they watch Bloo's "improvements" of Mac's home movie—the "improvements" being Bloo adding farting sound effects every ten seconds, something you wouldn't expect someone like Herriman to find humor in.
    "How bawdy."
• Obsessively Organized: He can't stand anything being out of place or disorganized.
• Obstructive Bureaucrat: Can sometimes come off this way.
• The Perfectionist: Sometimes to a ridiculous extent.
• Reasonable Authority Figure: While he is a stickler for the rules, he isn't all bad. 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, enough for him to start keeping a closet full of copies.
• Rhymes on a Dime: His highly entertaining "Sweet Little Girl" routine.
• Technologically Blind Elders: "World Wide Wabbit" shows that he is completely hopeless when it comes to modern tech. When he learns that there is a file with embarrassing footage of him, he goes straight for the filing cabinets. Then after learning the file was on Frankie's computer, he dumps the whole thing in the trash, not realizing that it was already uploaded to the internet. He even thinks that the internet is an actual net.
• Trademark Favorite Food: Carrots. He's quite addicted to them.
• They Changed It, Now It Sucks!: In-Universe. 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 countless other 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 ViewTube) has over 12 million views, so perhaps the original Funny Bunny routine still was popular.
• Undying Loyalty: Herriman has stayed by Madame Foster's side ever since she imagined him as a little girl. Considering how old Madame Foster is, that is a lot of years of loyalty.
• 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.
• Vetinari Job Security: Every time he stops being the house boss, either because he lets his hair down or the house residents put someone else in power, everything falls apart shortly thereafter and he very quickly gets his old job back.
• 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. In fact, "Let Your Hare Down" gives us a perfect example of what would happen without his strictness.
• Why Did It Have to Be Snakes?: Has a fear of dogs in "Who Let The Dogs In?", due to him being based on a prey animal. So great is his fear that he even called out "Frankie" instead of "Ms. Francis".
  Mr. Herriman: Dogs...eat...rabbits!

Madame Foster

Madame Foster

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

Voiced by: Candi Milo

The elderly owner of the titular mansion; very lively for her age.

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• 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 larger than life and incredibly pleasant at the same time, which makes her so awesome. She is much nicer than Herriman, and often plays along with Bloo's antics.
• Deconstruction: Of Cool Old Lady archetype. While for the most part she's perfectly pleasant to be around and a generally well-liked figure among the residence, being a kid at heart also has her not doing much actual work around the Home apart from owning it, and she tends to give into her vices because it amuses her or lose her temper, which accounts for her Kick the Dog moments
• Dirty Old Woman: From time to time, she is revealed to have quite the perverted mind. In "World Wide Wabbit", when Eduardo yells at Wilt and Coco to take off their clothes, specifically the Funny Bunny merchandise they're wearing, Madame Foster lets out a big "Yeah!", and takes off her sweatshirt and waves it about. She also hoots and hollers, looking visibly fascinated by Jackie Khones' singing during the end credits stinger to "Schlock Star".
• 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, she's this, giving advice, sewing, and knitting.
• Jerkass Ball: Madame Foster holds many of these throughout the series, for someone who is often good-natured:
  • At the very end of "Store Wars", she's completely ungrateful at Bloo's attempt to give her a birthday present, stating that "the thought doesn't count".
  • Then, in "The Big Lablooski", 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 "Beat with a Schtick", when she finds out Bloo is going to face "The New Guy", who's a gigantic monstrous-looking imaginary friend, what does Madame Foster do? She raises money off of Bloo's suffering by betting against him in a poll. For someone who's supposed to be the founder and head mistress of the household, isn't Madame Foster supposed 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 Bloo or the joke he made at the New Guy's expense.
  • A prime example would be stealing the airplane tickets from Mac to travel with her friends at the end of "Foster's Goes to Europe". Many fans agree that was probably her lowest point in the series.
  • 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 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 owner of the home.
  • In "I Only Have Surprise For You," she, along with almost everyone else^note Eduardo was only a part of the prank because of the instructions Bloo gave him, was a part of the prank to give Mac a humiliating surprise party, by pretending to be Artie, an imaginary friend who Mac is supposedly doing a birthday party to.
  • In "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,) Madame Foster is no better and fails to hold up her end of the bargain simply because she found something that interests her. Made all the worse when her friend Flo comes and she chooses to wait longer despite promising Bloo they'd be going right after they paid to leave.
  • In "Ticket to Rod", Madame Foster takes a massive Jerkass Ball moment towards 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 "Foster's Goes to Europe" and making it into a full episode.
• Miniature Senior Citizens: She's even smaller than Mac. A progression of pics with Frankie shows she might have been taller but got shorter as time passed.
• Morality Pet: To her imaginary friend, Mr. Herriman, in a sense. She's basically the only person who can convince Herriman to not be such an overbearing stickler for the rules.
• Nice Girl: She's a sweet, benevolent, kind, friendly and good-natured person.
• Pet the Dog: "Foster's Go to Europe" indeed has one of her worst moments in the entire series, however with her tickets she brought along Eurotrish, an imaginary friend who was looking forward to going to visit her original family, only to repeatedly become dejected because Bloo was changing his mind about going. It unfortunately makes The Stinger of the episode more harsh, however.
• Posthumous Character: Subverted in the pilot, to the point where it's a Late-Arrival Spoiler. The pilot has her mentioned and appear in portraits several times, but she herself doesn't appear for most of the runtime, implying that she passed away some time ago. The end is when she does make her appearance, even lampshading this when Bloo exclaims his surprise at her being alive.
  Bloo: Madame Foster! You're alive!
  Madame Foster: Huh? Well, of course I'm alive, whadaya think?
  Bloo: Well, just that I've been here a few days, and I never saw you, so I just figured...
  Madame Foster: It takes me a while to get down the steps, okay? I AM OLD!!!
• Reasonable Authority Figure: When she isn't being eccentric, she is capable of providing guidance and is far less uptight than Herriman and, to an extent, Frankie.
• 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.

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