Main Characters:
* Mordecai: A blue jay who's constantly trying to impress his friends, especially Rigby. He's often lazy and goofy, but ultimately a good guy.
* Rigby: A raccoon who's lazy, irresponsible, and always looking for a good time. He's Mordecai's best friend and often gets into trouble with him.
* Benson: A gumball machine who's the strict, uptight manager of the park. He's constantly trying to keep Mordecai and Rigby in line, often to no avail.
* Skips: A bigfoot who's incredibly strong, fast, and seemingly immortal. He's the wisest and most capable of the park workers, and often helps out Mordecai and Rigby.
* Muscle Man: A muscle-bound, loud, and goofy man. He's often seen with his best friend, High Five Ghost.
* High Five Ghost: A spectral being who's Muscle Man's best friend. He's very enthusiastic and often high-fives people (especially Muscle Man).
* Pops: A lollipop who's the owner of the park. He's very kind, eccentric, and often oblivious to what's going on around him.
Recurring Characters:
* Margaret: A female blue jay who's Mordecai's love interest. She's a bit of a tomboy and is very confident.
* CJ: A female squirrel who's Rigby's love interest. She's very energetic and often teases Rigby.
* Thomas: A grumpy old man who's a regular at the park.
* Eileen: A female unicorn who's Benson's love interest. She's very sweet and supportive.
* The Power: A mysterious, powerful entity that often appears in the show.
* The Anti-Pops: An evil, alternate version of Pops.
* The Death Bear: A giant, terrifying bear that's the embodiment of death.
* The Killer-Robot: A robotic assassin that's often seen in the show.
This list includes some of the most well-known characters. Regular Show has a huge cast of recurring and one-off characters, each with their own quirks and personalities.