A thrill-seeker who enjoys extreme sports and karate. Originally from Texas, she has a Southern accent and loves rodeos. She is a scientist and built her own treehouse and diving suit. She is also a member of the Girls along with Karen, Mrs. Puff, and Pearl. Originally from the state of Texas, known from the episode of the same name, she has many cowboy traits. She speaks with a strong Southern accent and uses typical Southern slang words and phrases. She has a great love for her homeland and its culture, which is especially evident in the episode "Texas," in which she becomes homesick and considers leaving Bikini Bottom to return to Texas. In the same episode, she becomes very offended by SpongeBob and Patrick's insults towards Texas and violently attacks them when they continue to insult her homeland. Along with Plankton and Karen (Sandy) is one of the most intelligent and well-balanced characters in the animated series. She is a multi-faceted individual, a gifted scientist and inventor, and originally came to Bikini Bottom to study sea creatures and their lifestyles. In the episode "Hey, Chimp!", it is revealed that she works with three chimpanzees. As an inventor, Sandy is capable of creating extremely advanced devices with ease. Her inventions include a manned spaceship, a teleporter, and a submarine that can shrink to microscopic size and penetrate the human body.

Just like real sperm whales, which have the largest brain size of any existing species on Earth, Pearl's brain is the largest of all the inhabitants of Bikini Bottom. She is talented at mathematics, which is why Mr. Krabs would like her to become a bookkeeper at his restaurant. However, she is still young and has not yet matured, so she spends most of her time and money at the mall. A cheerful, sometimes naive, and good-natured girl, she wants nothing more than to fit in with the other residents of Bikini Bottom, but this is impossible because she is literally the largest teenager in the ocean. She is very friendly and trusting towards her peers at Bikini Bottom High School. She is usually optimistic, unlike her father, who can sometimes be irritable.

Pearl was born to Mr. Krabs and Mrs. Krabs. She appears to have inherited most of her mother's physical features and her father's small size. On the day she was born, Mr. Krabs bought a birthday banner at a yard sale. It said "It's a boy," so he crossed out "boy" to write "Girl." Pearl has had the same bed her father bought her for $30 since she was a newborn. When Pearl was a baby, she was much smaller than Mr. Krabs and had only one small strand of hair tied in a bow. She had a single tooth, like Patrick. As a child, Pearl grew a full head of hair, but was still shorter than her father. As a teenager, she grew taller than Mr. Krabs. She always had a heart shape on the front of her face, indicating that it may not be lipstick. Throughout her early childhood, Pearl was constantly with a babysitter. Squidward. She calls him "Uncle Squid." Pearl has gray skin and is very tall compared to the other characters. She has blonde hair, which she ties into a ponytail with a pink elastic. There is a red center at the bottom of her nose, which turns into lips when she kisses. She has solid blue oval eyes and six eyelashes on each eye. Pearl has five ventral folds on her neck, usually drawn as five lines, the middle one being longer than the others. Only four folds are usually visible, as she is usually seen from the side. Pearl is one of the few characters with one eye on each side of her head, meaning she has monocular vision. Pearl's usual outfit is a pink cheerleader dress with a purple skirt and the letter "P" embroidered on the front. She also sports white go-go shoes made from seashells.

He is the main antagonist of the franchise. There are also several episodes in which Plankton acts as a sympathetic antihero. Plankton despises his rival, Mr. Krabs, for running a successful restaurant because his own business rarely attracts customers. His main goal is to steal the secret Krabby Patty formula and put Mr. Krabs out of business. Karen suggests many plans for him to steal the formula, but their efforts always end in failure. Plankton, as his name suggests, is a tiny, dark green planktonic copepod that can fit in the palm of your hand. He has one yellow eye with a red pupil and a white (sometimes pink) highlight. He has two long, thin antennae with four small green spikes sticking out along them. He also has one black, bushy eyebrow. He has no ears or nose. He usually has no fingers or toes, but he can regrow fingers when needed. He is selfish, aggressive, and power-hungry. He is extremely jealous of Mr. Krabs and his success. His sole goal throughout the series is to steal the secret Krabby Patty formula and put Krabs out of business, a desire that has led him to destroy the Krusty Krab more than once. He is manipulative, just as he manipulated SpongeBob.

A red crab who lives in an anchor house with his adopted daughter, Pearl, who is a sperm whale. He is the owner and founder of the Krusty Krab restaurant and the employer of SpongeBob and Squidward. He is extremely greedy and obsessed with money, to the point that he treats money better than his employees and his daughter. The series exaggerates Mr. Krabs's greed, with him often humanizing money. Mr. Krabs is generally respected by SpongeBob, who sees him as a father figure, while Squidward tends to hate him. Mr. Krabs's main enemy and business rival is Sheldon J. Plankton, co-owner of the Chum Bucket restaurant with his wife, Karen. Plankton was Krabs' best friend as a child, but now he intends to steal the secret Krabby Patty formula that makes the Krusty Krab so famous. Successful. Short, red-haired, portly, with very tall eyestalks, a wrinkled nose, large pincers, and short, pointed legs. The spikes on his shell are also visible on the back of his neck. He wears a light blue shirt and pants with a black belt. A sailor or pirate ship is often associated with Mr. Krabs. Many times when he appears on screen, sailor music from a sea shanty plays.

Squidward has a reputation for being a character who suffers from injuries and misfortune in his unfortunate life. He has had numerous health problems, both physical and mental. His misfortunes often land him in the hospital, bandaged, or randomly attacked by characters, resulting in excruciating pain. Much of his bad luck serves as karma for his bad attitude, although a fair amount of it occurs unnaturally, even when he's minding his own business. Squidward works as a cashier at the Krusty Krab, alongside his co-worker, SpongeBob. He not only hates his job, but also the restaurant itself, and he performs his job rather poorly and without enthusiasm. He is also often rude to customers. He has often expressed a desire to be fired or simply quit, but has never succeeded. While he initially only seems to work there because he needs the money, he seems to only be there out of sheer laziness before getting another job.

A light teal octopus with purple suction cups at the end of his tentacles. He has a total of six limbs, two of which are arms and four are legs, which tend to form a plus sign when he stands still. Whenever he walks, his suction cups stick to the floor, meaning he walks with a distinct squishing sound. Squidward has a large skull with eight spots on top. He once had long blond hair. He also has a thin body, a large droopy nose, a wide mouth, and yellow eyes with rectangular maroon irises. When he laughs, his nose appears to deflate and inflate repeatedly (in earlier episodes, this corresponded to a sound effect). He wears a brown shirt. He is rude, arrogant, stubborn, grumpy, narcissistic, and sometimes sadistic. He views the world in such a negative light that he is rarely seen greeting. He hates his job at the Krusty Krab and isn't a good employee, often seen sleeping or reading on the job. Despite his personality, he remains one of the most intelligent and educated characters. He has a sarcastic attitude and views others as uncivilized klutzs, while failing to accept his own personal shortcomings. Squidward considers himself misunderstood and undervalued, blaming society for his failures. He is annoyingly pretentious in his pursuit of fame and is either unwilling or unable to recognize talent and creativity, even belittling it.

He usually wears lime-green pants with lavender flowers. The first film shows him wearing Goofy Goober underwear, which he wore for three years straight. He changed them after becoming "human." When he sleeps alone, he usually wears solid-colored underwear, but when he has company, he wears purple pajamas with pale green flowers and a matching nightcap. Like the other characters, Patrick has no ears, but he has excellent hearing. Patrick is depicted as a pleasant, overweight, lazy, dim-witted, ill-mannered, naive, and generally ignorant person. Despite being an adult, Patrick acts immature for his age and participates in many childish activities with SpongeBob. Patrick's personality is similar to SpongeBob's, but they are not interchangeable, as SpongeBob is much more intelligent, responsible, optimistic, well-mannered, and down-to-earth than SpongeBob. Patrick. His stupidity often irritates SpongeBob and causes him a lot of inconvenience. He is hot-tempered and prone to psychopathic tendencies if something upsets him. Patrick has no nose, which means he can't smell at all.

A naive and chubby pink starfish. He lives under a rock in the underwater city of Bikini Bottom. SpongeBob and Squidward are his two neighbors. Both he and SpongeBob enjoy bothering Squidward, though they do so unknowingly and with good intentions. He is the son of Herb and Margaret Star and the older sister of Sam Star. He is a chubby coral-pink starfish with a pointed head, bushy eyebrows, and red dots across his body. In the first season, his eyebrows were thin and shaped like a pair of Ms. The flowers on his pants were also dark purple instead of light. He has either a full set of teeth, one tooth, or sometimes none at all.

An ignorant, deranged, immature, cheerful, and hyperactive individual with a carefree nature. He is extremely determined and often stops at nothing to complete a task. He is also somewhat dramatic towards people who are kind to him, such as the mail fish. He is also overly confident. Sometimes, however, he shows his cunning side, as when he tries to reconcile Mr. Krabs and Plankton. He sometimes makes mountains out of wormholes, such as losing his name tag. It is also suggested that he tricked the Strangler in an elaborate plot to get him back into prison. SpongeBob is very kind-hearted and innocent, and very rarely acts openly cruel towards anyone, even those who find him annoying and are cruel to him. He is a very selfless and loyal person, especially towards his loved ones. His selfless nature is most clearly shown in "The Best Ever" day", where he sacrifices his "perfect day" to help his friends. Despite his well-meaning intentions, SpongeBob's actions often annoy and cause trouble for those around him, especially his next-door neighbor, Squidward Tentacles. SpongeBob can get scared easily and usually panics when scared. He is afraid of the dark and clowns. He also hates hot sauce. Sometimes, SpongeBob is too ignorant to notice impending danger, and his otherworldly thinking can endanger himself or others. He also cannot detect lies or malice as easily as other characters, mainly due to his naive nature. While SpongeBob is usually a goody-two-shoes, he sometimes shows antagonism and inconvenience towards others. However, he often does this unconsciously and with good intentions, while other times he does it out of self-interest. Being a sponge, he also SpongeBob absorbs moisture and can expand his body to absorb liquids. Sometimes, when SpongeBob cries, he reabsorbs his tears. He can also absorb blows.

A yellow square sponge. Although he looks like a kitchen sponge, he is actually a sea sponge. SpongeBob wears square brown pants, which are paired with a white shirt, a red tie, and a black belt. He has white socks with a red and blue stripe. SpongeBob has a long, sticking out nose that droops when he is sad. SpongeBob has three red freckles on each cheek. Two of SpongeBob's teeth protrude from the outside, while the rest are inside. As befits a sea sponge, SpongeBob has many green pores all over his body, 40 in fact. Like most cartoon characters, SpongeBob has four fingers on each hand. SpongeBob has the ability to stretch body parts, change shape, separate certain body parts, and divide into several parts, with each part performing a specific task. An important ability of SpongeBob is regeneration. He He can tear off his own arm or leg, and they will grow back almost instantly.