Narrator

- Male - A yellow square sponge character with large eyes, always wearing a white shirt, red tie, and brown shorts. - Bright, positive, curious, and kind personality. - Works as a fry cook at the Krusty Krab. - Patrick's best friend. - Hobbies include catching jellyfish with Patrick and making Krabby Patties at the Krusty Krab.

- Male - A pink star-shaped character with a round belly and small eyes and mouth. - Relaxed, lazy, and simple-minded personality. - Unemployed. - SpongeBob's best friend. - Hobbies include catching jellyfish with SpongeBob.

- Male - A light blue octopus character with a large nose, round head, and eight tentacles. - Irritable and blunt personality. - Works as a cashier at the Krusty Krab. - Hobbies include painting and playing the clarinet, though his playing is very noisy.

- Male - A red crab character with large claws and pointed eyebrows. - Greedy and loves money. - Owner of the Krusty Krab. - Relationship with Plankton: Childhood friends, but also rivals. - Keeps the Krabby Patty secret formula in a glass bottle inside a private safe. - Hobbies include collecting money.

- Male - SpongeBob's pet sea snail. He has red eyes with black pupils, a light blue body, and a light green underside. - His shell is pink with dark red swirls on the sides and purple spots. - Obedient to SpongeBob and very intelligent. - Meows like a cat.

- Male - A green plankton character with a single large eye, red pupil, and antennae. - Has an inferiority complex and is very ambitious. - A genius scientist and owner of the Chum Bucket, located directly across from the Krusty Krab. - Extremely tiny, needing a magnifying glass to be seen; the smallest resident of Bikini Bottom, often stepped on or blown away. - Has an AI wife named Karen who helps him try to steal the Krabby Patty secret formula, though they fail every time. - Relationship with Mr. Krabs: Childhood friends and rivals. - Hobbies include stealing the Krabby Patty secret formula.