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

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Voiced by: Sean Marquette

A creative, smart, and very warm-hearted 8-year old. Bloo is his imaginary friend.
  • Absentee Actor: It is possible that his voice actor (Sean Marquette) was busy with something else during the making of the episode "Pranks for Nothing".
  • Adorably Precocious Child
  • Author Avatar: Creator Craig McCracken based Mac on himself as a child.
  • Adorkable
  • All-Loving Hero
  • Ax-Crazy: Mac's personality goes from a very Nice Guy to completely lunatic 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.
  • Birthday Hater: With a twist; Bloo giving him surprise birthdays 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.
  • Cheerful Child
  • Chivalrous Pervert: The pervert part is implied, the chivalrous part is clear-as-day.
    • Covert Pervert: Also, 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 Conscience
  • The Cutie
  • G-Rated Drug: NEVER give Mac sugar. Seriously.
  • Disappeared Dad: Mac's father is never mentioned. He just has his mom and big brother.
  • Early Installment Weirdness: In 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 maybe sugar-free, but still, makes you wonder...
  • Heroes Want Redheads: His crush on Frankie.
  • Masculine Girl, Feminine Boy: The Feminine Boy to Frankie's Masculine Girl.
  • Nice Guy
  • 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.
  • Only Sane Man: This trope, however, is wonderfully averted if he eats too much sugar.
  • Out-of-Character Moment/Took a Level in Jerkass: When he gives Goo a mean "The Reason You Suck" Speech, which makes Goo cry. Thankfully, he makes it up with a heart-to-heart talk and apologizing.
    Mac: I don't like you! Not a person in this house likes you either! You're odd, talk in a weird way and really fast for that matter! Mr. Herriman is a rabbit, NOT a badger! Bloo's name isn't Chester, it's Bloo, bannanas don't contain protein you numbskull, nuts do! But you don't need anymore nuts since you're nuts! You're the place where they keep all the nuts! It's contagious! You spread the nuts to everyone in this house! Everybody thinks you're a nuisance and they all want you to just GO HOME!
    • My God, What Have I Done?: while Mac said that because he was so steamed, he looked in the present Goo was about to give him. Turns out she gave him a new backpack to replace the one that was rendered unusable at the start of the episode. Needless to say, Mac realized he shouldn't have snapped and apologized to Goo.
  • 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 figuriene 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.
  • Precocious Crush: His crush on Frankie.
  • Puppy-Dog Eyes
  • "The Reason You Suck" Speech: Delivers one to Goo in "Go Goo Go". Doubles as Out-of-Character Moment and results in My God, What Have I Done?
  • Red Oni, Blue Oni: The blue to Bloo's red.
  • Savvy Guy, Energetic Girl: Savvy Guy to Goo's Energetic Girl.
  • Sensitive Guy and Manly Man: The Sensitive Guy to Bloo's Manly Man.
  • 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.
  • Shrinking Violet
  • Squishy Wizard
  • 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
  • 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, 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.

    Francis "Frankie" Foster 
Voiced by: Grey DeLisle

Granddaughter of Madame Foster; caretaker at the mansion.

    Madame Foster 
Voiced by: Candi Milo

Owner of the mansion; very lively for her age.

    Goo Goo Ga Ga 
Voiced by: Grey DeLisle

An extremely talkative girl who has imagined LOTS of friends.

Voiced by: Tara Strong

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

    Mac's Mom 
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 Terrance'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
  • Invisible Mom: While you get to see her back most of the time and hear her voice, you never actually get to see her face.
  • Male Gaze
  • Parental Neglect: She hardly ever gets to see Mac, because she works all day every day.

Imaginary Friends

    Blooregard "Bloo" Q. Kazoo 
Voiced by: Keith Ferguson

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

Voiced by: Phil LaMarr

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

Voiced by: Candi Milo

A palm-tree/aeroplane imaginary friend with a language based on her own name.
  • Balloon Belly
  • Bilingual Dialogue
  • Cargo Ship: In-universe; she's shown affection towards a lamp and a mop.
  • Cloud Cuckoolander
  • Dark and Troubled Past: While it's never stated in-universe, Word Of God says that Coco was created by a little girl that 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.
  • 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.
  • The Loonie
  • 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.
  • Out of Focus: Season 5
  • Pokémon Speak
  • 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

Voiced by: Tom Kenny

An imaginary friend resembling a huge, hairy monster with a heart of gold.
  • Adorkable: Super friendly, and incredibly kooky.
  • 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
  • Cloud Cuckoolander: He definitely has his "LOCOOOOOOOOOOOOO!!!!!!!!!!!" moments.
  • Cuddle Bug: Gives (nearly bone-crushing) hugs to people he's worried about.
  • 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.
    • Cowardly Lion: However, 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 suituation unless someone's beside him or he's in a group, and even then he's not going to be happy.
  • Gratuitous Spanish
  • Papa Wolf. Don't hurt his friends or he'll attack.
  • 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.

    Mr. "Funny Bunny" Herriman 
Voiced by: Tom Kane

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

Voiced by: Candi Milo

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

Voiced by: Grey DeLisle

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

    Duchess Diamond Persnickety 
Voiced by: Grey DeLisle

An ugly, snobbish and downright mean aristocratic imaginary friend.

    Jackie Khones 
Voiced by: Phil LaMarr

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

    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, created by siblings as a fun outlet for their sibling rivalry.

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