Jim played by Crispin Glover. Everyone loves him and his ridiculous dance moves!
Ted is popular as well, mainly for being Jimbo's Hetero Sexual Life Partner, along with the two of them providing the most comic relief.
Of course, the biggest example is Tommy Jarvis, arguably the most popular character in the entire series after Jason himself.
Even Better Sequel: This film tends to vie with Part VI for the title of best in the series, thanks to Jason in full-on slaughter mode (with hockey mask!), Tom Savini being at the top of his game with the gore effects, and most of the characters actually being well-acted and written with some depth.
Nightmare Retardant: Rob's death. The director intended to create a horrifying scene that showcases the helplessness of a murder victim. The result is a scene where Rob, the guy who has been build up to be a worthy opponent to Jason, does nothing to stop him while striking a dramatic pose against a wall and screams "HE'S KILLING ME! HE'S KILLING ME!"