Narrator

-Male -A yellow square sponge 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. At the Krusty Krab, he makes hamburgers called Krabby Patties. -He calls Plankton "Sir" and uses polite language with him.

-Male -A pink star-shaped character with a round belly and small eyes and mouth. -Easygoing, 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 limbs. -Irritable and blunt personality. -Works as the cashier at the Krusty Krab. -Hobbies include painting and playing the clarinet, though his clarinet playing is extremely noisy.

-Male -A red crab with large claws and pointed eyebrows. -Greedy and loves money. -Owner of the Krusty Krab, where the hamburgers are made. -Relationship with Plankton: They were friends in school but are now rivals. -The Krabby Patty secret formula is kept in a glass bottle inside a private safe. -Hobby is collecting money.

-Male -SpongeBob's pet sea snail. He has red eyes with black pupils, a light blue body, and a light green underside where he touches the ground. -His shell is pink with dark red swirls and purple spots on the sides. -He is smart and obeys SpongeBob well. -He meows like a cat.

-Male -A green plankton with a single large eye featuring a red pupil, and antennae. -Personality is ambitious and full of inferiority complexes. -A genius scientist and owner of the Chum Bucket restaurant located right across from the Krusty Krab. -Tiny in stature; he is the smallest resident of Bikini Bottom, often getting stepped on or blown away, and requires a magnifying glass to be seen. -He has an AI wife named Karen. Karen helps Plankton try to steal the Krabby Patty secret formula, but they fail every time. -Relationship with Mr. Krabs: They were friends in school and are now rivals. -Hobby is stealing the Krabby Patty secret formula.