Manny: Blue hair. Simple-minded and curious. Claire's husband and father to a daughter named Janet. Harry: The most normal one. Has long red hair and a cynical personality. He is the owner of a factory. Robin: Wears a green duck hat and loves reading the newspaper. All three are male.

Teachers often suddenly start conversations related to their specific themes. Paige: Female, white hair. The only teacher who reformed after forcing her opinions on others. Usually in sketchbook form (furniture). Theme: Creativity. Bright personality and not too unkind. Hates the color green. Tony: Blue hair, male. Theme: Time. Acts overbearing regarding time. Initially kind but becomes increasingly violent. Usually in clock form (furniture). Shrignold: Male. Has a history of mentally torturing Manny. Teaches incomprehensible methods like a cult leader. Theme: Love. Butterfly form (not furniture). Colin: Thinks he is smart. Male. Theme: Computers. Computer form (furniture). Healthy Band: Theme: Health, but never actually says anything healthy. (Steak: Male, leader. Spinach Can: Female, Steak's assistant. Bread: Male, does weird things. Fridge: Male, interrupts often.) Larry: Male. Causes various bizarre dreams. Usually in lamp form (furniture). Theme: Dreams.

Briefcase: Male. Theme: Jobs. Wears glasses. Usually in briefcase form (furniture). Coffin: Male. Literally a coffin (furniture). Theme: Death. Torments Robin the most. Lily and Todney: Twin siblings consisting of Lily (female) and Todney (male). Severely cross-eyed. Theme: Family (not furniture). Warren the Worm: Male. Claims he was bullied in the past. Theme: Friendship. Worm form (not furniture). Mr. Choo-Choo: An old train (furniture). Male. Coughs frequently. Theme: Transport. Electracey: Female. A meter that acts as a generator. Theme: Electricity. Looks like a typical tin robot (furniture). Humanoid version has red, yellow, and blue hair with odd eyes (yellow and green). Rock Teacher: Female. Owns a pickaxe. Resembles a sharp grey rock (furniture). Has a clump of grass mimicking hair. Humanoid version has straight green hair. Teaches with Boundary Man. Loves rocks. Boundary Man: Male. Teaches with Rock Teacher. Shape of a dark blue hand with four fingers. Arms and legs similar to Tony's. Behind the hand is a stop sign (furniture). Humanoid version has blue hair and wears a red suit.

Factory Info: Named Peterson's and Sons and Friends Bits and Parts Limited. A parts factory. Claire: Female, wrench form. Molds dough into parts. Manny's wife and mother to Janet. Sally: Female, sign form. Janitor. Dislikes accidents. Andy: Male. Controls the machine that marks part quality. Hex bolt form. A cheerful and passionate employee. Duncan: Male. Works via website. Bolt form. Robin dislikes him. Sometimes fails to perform his duties properly.