Main Character

Spongebob Squarepants - He is an optimistic and friendly sea sponge who works at the Krusty Krab, attends boating school, and hangs out with his friend Patrick, or spends time with Sandy, a squirrel. He's always happy.
Patrick Star - Spongebob's best friend and neighbor, who is a starfish. He is known to not do anything, and makes him a negative influence over his best friend because his lack of intelligence. He is the dumbest creature under the sea
Squidward Tentacles - SpongeBob's neighbor and co-worker. SpongeBob and Patrick view Squidward as their friend, but he finds SpongeBob and Patrick to be very annoying, and usually dislikes the two. He also plays the clarinet (badly), and has a deep interest in the arts.
Eugene H. Krabs - SpongeBob and Squidward's boss, a money-obsessed crab who is the owner and founder of the Krusty Krab.
Sandy Cheeks - A female squirrel from Texas. She is one of SpongeBob's friends. She need a pressurized suit to live under the water. She plays a lot of extreme sports. She and Spongebob love Karate.
Gary the Snail - SpongeBob's pet snail who meows like a cat. He may look dumb, but he might be smarter than the rest of Bikini Bottom. He keeps cool underpressure and has a solution for every problem.
Sheldon J. Plankton - Mr. Krabs' rival who is the owner and founder of the Chum Bucket. He continually tries to steal the Krabby Patty formula but has never succeeded.

Setting of Spongebob Squarepants


Bikini Bottom
 
Much of the series' events take place in Bikini Bottom, an underwater city located in the Pacific Ocean beneath the real life tropical isle of Bikini Atoll. Stephen Hillenburg has stated that much of Bikini Bottom was based on the real life city of Seatlle, Washington. In many episodes, the laws of physics are violated for comedic value. The citizens of Bikini Bottom live in mostly aquatic-themed buildings, and use "boatmobiles", an amalgamation of cars and boats, as a mode of transportation.
The city consists of various businesses, including restaurants, stores, and manufacturers. The city has a stable economy, a balanced education system, health care, a structured government, and a firm law enforcement system. There are even stadiums, amusement parks, and other recreational facilities.