Cloudy J (better known as "CJ") is a recurring character in Regular Show. CJ is Mordecai's second known girlfriend (also Margaret's chief rival for his affections), and made her debut in the episode "Yes Dude Yes". She is voiced by Linda Cardellini.

CJ is a cloud-humanoid with white skin and a cloud-like face with hair that looks as if it's tied in a pony-tail. She wears a scarlet-striped tank top (goofed light orange while playing Laser Tag), brown shorts, and small black-gray boots.