Gender: Male ♂ Age: at least 31 Birthday: 1973 Like(s):Basketball,Apologizing,Helping others Dislike(s): Mean People, Lying, Bloo's selfishness Wilt is kind-hearted, friendly, cool, helpful, lighthearted, honest and incredibly nice. He remains optimistic and confident despite his troubled past. He's also known for frequently apologizing, often starting his sentences with “I’m sorry, but…” and ending them with “Is that okay?” even when there’s no real reason to apologize. Wilt has red skin and stitches on his left arm and his face sides. His left eyestalk is crooked making him blind in one eye, while his right one is fine. His right arm is normal, however his left arm is a short stump that he can move regardless. He also has two long legs, for a total of four limbs. He has a number 1 on his chest akin to one on a basketball jersey, a single wristband on his right arm, white long tube socks with red and blue stripes on the cuffs, as well as black and white basketball sneakers that make his footsteps squeak like he's on a basketball court when he walks around he is 10ft.

Species: Imaginary Friend Gender: Male ♂ Age:At least 20 years old Like(s) Paco Potatoes Dolls Dogs His friends The TV show Lauren is Explorin' Christmas Cute animals Dogs Eduardo is a muscular 7-foot tall (to his horns), 542-pound monster-like "guardian friend". He resembles a mixture of a minotaur and beasts from Maurice Sendak's Where the Wild Things Are with purple fur, angled horns, sharp fangs, a pinkish-purple ape-like face, a black scribbly unibrow, black claws, and purple devil-like tail. He wears a black belt with a skull-shaped buckle and silver studs, and gray pants and shoes. Despite his menacing appearance, Eduardo is one of the gentlest friends in the entire house. He speaks in third person most of the time. He sometimes speaks in Spanish phrases or words, often calling Bloo "Azul". Essentially, it can be considered that he speaks "Spanglish". Despite being a protector friend, he's a total coward; as noted in "House of Bloo's" by Wilt, he wouldn't hurt a fly because, as Eduardo pointed out, he's too scared of them. Despite his fear, when motivated, by either need or fear from an actual threat, he is a powerful protector. However, he takes little to no initiative to protect himself because of his gentleness, despite being able to pummel far larger beings than himself into the ground.

Species: Imaginary Friend (Bird-Palm tree hybrid) Gender:Female ♀ Coco is kind, benevolent, helpful, funny, silly, ditzy and surprisingly sarcastic. Coco has a palm tree for a head, a crooked red beak, a blue and white airplane body, and orange legs and feet. She is 4 feet tall and weighs 80 pounds. Coco, according to a golden trading card in the Foster's Home for Imaginary Friends Leapster game, was created by a girl who crashed on a desert island, which could explain her appearance of the palm tree head and airplane body. She was discovered by two scientists named Douglas and Adam (called "nerds" by Bloo), who were introduced in "Good Wilt Hunting." Since they found her alone, Coco's original creator has never been mentioned nor known what became of her. Her only verbal utterances and written means of communication is "coco".

Species:Imaginary Friend Gender:Male ♂ Age:5 Birthday:1999 Mac created Bloo when he was three years old, meaning that, by the start of the series, they had been creator and creation for five years. According to a trading card in the Foster's Home for Imaginary Friends Leapster game, Mac created him when he had to give away his favorite blanket.He's at the core of his personality, clever and self-centered. In Season 1, Bloo was shown to have a slightly gentler personality; however, when Season 2 began, he developed a mischievous, jealous, greedy, narcissistic, and immature personality. He is also shown to be a rebel, compared to Mac, who is the smart one. Bloo is abrasive, troublemaking, immature, jealous, and manipulative, partially due to his restless energy, cleverness, and delusional narcissism.

Species:Human Gender:Male ♂Age:8Birthday:May 3rd, 1996Mac is an 8-year-old boy with long brown hair, brown eyes and tan skin. His head is in the shape of a rounded cube and his body an isosceles triangle. He wears a red T-shirt with a white sweater underneath, a dark green backpack on his back, tan khakis, and black tennis shoes with white stripes Mac is a bright, selfless, smart, sensible, imaginative young boy who is not afraid to show his emotions, and the creator of Bloo.

Species:Human Gender:Female ♀ Age:22 Birthday:July 25, 1984Considered as pretty by several characters, Frankie is a tall, slim-statured young woman with fair skin, bright green eyes (according to her driver’s license), and long, spiky red hair with bangs, usually kept into a high half-ponytail by a black hair tie. She accessorizes with a purple hair clip in her hair, multiple piercings on her ears, and a thin black choker around her neck Frankie is generally a kind, hard-working, sweet, capable, easygoing, friendly and caring woman. Being the caretaker at the foster home, she is very hardworking and tries to keep everyone and everything on track. Due to her job, she is prominently more level-headed and rational as she tends to act as the voice of reason, She is also the driver of the road trip They are sleeping in a van