Designated Hero: Fingal. You can't blame him for being upset at how things have gone for him, but that doesn't justify his actions. He fights against Novicorp even as they're trying to recover his body (even if they're only doing it to save their stock value, as explained in a scene cut from the MST version) and even after Apollonia explains that his actions in the computer are affecting the real world he continues to screw around just to piss them off. It's clear he didn't know just how widespread the damage was, but he still knew he was doing something.
Designated Villain: Novicorp and the Fat Chairman. He's definitely a Smug Snake and it's pretty clear that he has something big planned for when they've buried Lexicorp once and for all. ("WE. WILL. WIN!") But the movie doesn't spend a whole lot of time explaining any of that, so as far as the audience knows the Chairman is just kind of a selfish Jerkass at worst.
Fridge Horror: When Fingal's body is eventually found, Djamilla off-handedly remarks that he was mistakenly next in line for a sex-change operation. Considering that his body tag was stolen and switched with someone else's, whatever happened to the actual owner of that sex-change tag that we see in the beginning of the film?