Characters

Berry — A polite, sweet-looking magenta imaginary friend whose obsessive crush on Bloo curdles into something genuinely scary when Mac gets in the way.
Billy the Squid — A pink octopus-alien hybrid imaginary friend with three horn appendages and the easygoing energy of someone who knows they look ridiculous and doesn't
Blooregard Q. Kazoo — A selfish, scheming, endlessly entertaining blue blob who is somehow Mac's best friend — the loudest argument against the idea that imaginary friends
Bloppy Pants — A shy, anxious grey tabby-cat-like imaginary friend who seems perpetually on the verge of apologizing for existing.
Cheese — An indestructible yellow nuisance who likes chocolate milk, screams without warning, and has somehow become the most quoted character in the show's hi
Coco — A palm tree-airplane-bird hybrid who can only say one word — and somehow everyone understands her, which says more about the house than about Coco.
Douglas and Adam — Two scientists who found an imaginary friend on a deserted island — no creator, no explanation — and raised her as their own.
Duchess — A two-dimensional, Picasso-faced imaginary friend with the personality of a countess and the face of a cubist nightmare — and absolutely nobody wants
Eduardo — A massive purple monster who looks like he could tear a building apart — and is absolutely terrified of butterflies.
Fluffer Nutter — A small pink squirrel-like imaginary friend who is, improbably, dating Jackie Khones.
Foul Larry — A gargantuan, basketball-themed imaginary friend who crushed Wilt's arm and eye — the monster in someone else's sports story.
Frankie Foster — The 22-year-old granddaughter of Madame Foster who runs the entire house — cooking, cleaning, managing two thousand imaginary friends, and getting no
Goo Goo Ga Ga — A hyperactive girl whose imagination is so powerful she creates new imaginary friends constantly — because she was lonely, and imagining friends was e
Goofball John McGee — An imaginary friend who looks like a human teenager in a clown costume — with an elephant trunk hidden under his nose, because of course.
Handy — An animate baseball mitt — yes, just a baseball mitt — who is a fully realized person with feelings and a social life.
Ivan — A seeing-eye imaginary friend covered in over a hundred eyes — created by a blind boy who imagined a friend who could see everything for him.
Jackie Khones — A one-inch-tall, one-eyed green stick figure with the deepest voice at Foster's and the coolest energy in any room he enters.
Jordan Michaels — The kid who created Wilt to be great at basketball — who grew up, made it big, and spent thirty years trying to find the friend who saved him.
Louise — Mac's neighbor and the actual creator of Cheese — the little girl responsible for unleashing the most chaotic imaginary friend in the show's universe.
Mac — An eight-year-old boy who visits his imaginary friend every day after school because giving him up completely was never really an option.
Mac's Mom — A single mother who told her eight-year-old to give up his imaginary friend — not because she's cruel, but because she gave up her own at his age and
Madame Foster — The elderly founder of Foster's Home — a tiny, white-haired woman with the energy of a teenager and the radical conviction that imaginary friends dese
Mr. Herriman — A stuffy, rule-obsessed imaginary rabbit in a top hat who runs Foster's Home like a Victorian bureaucracy — and who was imagined into existence by a l
Nina Valerosa — The little girl who imagined a giant purple monster to protect her — and grew up to become a police officer who protects people for real.
Red — Terrence's imaginary friend — a red cube with all of Terrence's charm and none of Terrence's size advantage.
Scissors — An imaginary friend who looks like a pair of scissors with bird legs — one of Foster's more abstractly designed residents.
Sunset Junction — A tall, navy blue bear-like imaginary friend wrapped in a woolen scarf — quiet, warm, and the kind of presence that makes a room feel calmer.
Terrence — Mac's older brother — a thirteen-year-old bully whose cruelty is as reliable as gravity and about as creative.
The Fleas — A colony of imaginary fleas — yes, someone imagined fleas — who are hostile to everyone except Eduardo, the only resident they respect.
Uncle Pockets — The legendary 'best imaginary friend ever' — a whimsical clown-like figure who pulls impossible things from his pockets and treats every moment like a
Wilt — The kindest soul at Foster's Home — impossibly tall, impossibly nice, and carrying thirty years of guilt over the arm he lost saving the kid who imagi
World — A lonely imaginary friend trapped inside a toy box who built an entire dimension to live in — and kidnapped Frankie because she was the first person w
Yogi Boo Boo — A tall green giraffe-like imaginary friend with an Indian accent and the combined personality of two classic cartoon bears.

Locations

Bloo, Wilt, Eduardo, and Coco's Room — The shared bedroom of Foster's four most prominent residents — cramped, chaotic, and somehow home.
Foster's Home for Imaginary Friends — A massive Victorian mansion that houses two thousand abandoned imaginary friends — impossible architecture, beautiful chaos, and the warmest orphanage
Mac's Apartment — A small apartment where an eight-year-old navigates a bully brother, an absent mom, and the daily secret of visiting the imaginary friend he was suppo
Mr. Herriman's Office — The nerve center of Foster's bureaucracy — green wallpaper, Victorian furniture, and filing cabinets containing more rules than any reasonable institu
The Adoption Desk — The front desk where children come to meet and adopt imaginary friends — the hopeful center of Foster's mission.
The Attic — The topmost storage space of Foster's Home — dusty, forgotten, and home to a chained toy box containing an entire trapped dimension.
The Backyard and Gardens — The expansive grounds of Foster's Home — gardens, play areas, and enough open space for two thousand imaginary friends to pretend they're not in an or
The Basketball Court — The outdoor court where Wilt practices every day — and the site of the game that cost him everything.
The Dining Hall — Where two thousand imaginary friends eat together — a logistics nightmare Frankie manages three times a day.
The Foyer — The grand entrance to Foster's Home — pink wallpaper, marble tile, and a staircase that's seen more imaginary feet than any structure in history.
The Stables — A garden stable for Foster's equine imaginary friends — because some children imagine pegasi, and pegasi need somewhere to sleep.
World's Toy Box Dimension — An entire reality inside a toy box — built by a lonely imaginary friend who had nothing but imagination and time.

Items

Bloo's Paddle Ball — Bloo's signature toy — a simple paddle ball he's obsessively terrible at, which somehow makes it funnier every time.
Coco's Eggs — Colorful plastic eggs laid by Coco at unpredictable intervals, each containing a random object — from bicycles to toasters to things that shouldn't fi
Mr. Herriman's Rule Book — An ever-expanding compendium of house rules that no one follows, everyone knows about, and Mr. Herriman will enforce until the heat death of the unive
The Toy Box — A chained wooden toy chest left on Foster's doorstep — containing not toys, but an entire dimension built by a forgotten imaginary friend.

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