SpongeBob SquarePants (voiced by Tom Kenny) works as a fry cook and lives in a pineapple under the sea. As befitting his appearance, he is a squeaky-clean square, annoying everyone around him with his cheerful optimism.

In the SpongeBob Musical, Sheldon J. Plankton is the owner of the Chum Bucket and a rival to Mr. Krabs, the boss of SpongeBob SquarePants at the Krabby Patty. In the Broadway version of the character, Plankton wears an eye patch to give himself one eye.

In SpongeBob SquarePants, Patrick Star (voiced by Bill Fagerbakke) is an overweight, dim-witted pink starfish. He’s unemployed, but works on occasion at Krusty Krab with his best friend SpongeBob.

Like SpongeBob SquarePants, the pink starfish is back in the SpongeBob Musical! Patrick Star takes on a humanoid form with a pink tie-dye shirt and the big hair to match.

The happy sponge of the cartoon world goes to stage! This time, SpongeBob SquarePants and the denizens of Bikini Bottom must band together to save their undersea world from utter destruction, all the while singing catchy show tunes.

Ariel is a rebellious mermaid princess who has a fascination with the human world. She strikes a deal with Ursula the seawitch to transform her into a human after she falls for Prince Eric. If you’d rather walk than swim, you can always opt for the skirt instead of the mermaid tail.