The SOB

''The Jerk but worse. Actually, any role but worse.''

The one who's a dick to everyone else without a real cause. Because of this, no one is the Asshole's friend. If the Asshole is part of the Main Group, the other members of the group might get on them for being an asshole, but the Asshole doesn't care.

The Asshole tends to also be another negative role, like the Bully or a Useless Secondary.