Princess Mindy is the tritagonist of The SpongeBob SquarePants Movie and a supporting character in its video game adaption. She is the daughter of King Neptune and Queen Amphitrite and Triton's sister. She knows all the names of the sea creatures. It is also certain that King Neptune will crown her Queen of the Sea one day.
Mindy has light-green skin, dark-blue hair, round glasses, a light-green tail, and a yellow hair bow. She wears a golden bracelet and also wears a pink midriff top with a red heart in the middle.
She is known to use "Mermaid Magic" to help others overcome their fears. There really is not any mermaid magic; it is just fake. Mindy tried to get SpongeBob and Patrick to keep going when they gave up their walk, she tried to convince them that she had "mermaid magic" (which obviously wasn't real), and used it to "turn them into men" by pulling seaweed out of the ground and putting them on their noses, successfully helping them by tricking that they were real mustaches. Dennis revealed the trick after SpongeBob and Patrick passed through the trench.
- In the video game adaptation of the movie, Mindy reveals she actually does have mermaid magic, which she uses to get the Patty Wagon back in exchange for 50 Goofy Goober tokens.
- She is the only character to have been grounded other than Mr. Krabs. Her grounding happens in the video game based on the movie.
- The reason Mindy didn't appear after the movie was due to there being a firewall between Nickelodeon and Paramount, which prevented characters and locations from the movie from being used in the show. The wall was broken in 2014 and Mindy made her TV debut in "SpongeBob's Big Birthday Blowout."