Karlie makes her first appearance in Dawn of the Madness as she crashed her car in the Shi-Tie mart.

Saved by Nick and Justin. She has apparent feelings for Nick. Her fate was at first unknown, but it was eventually confirmed that she's alive in DOTM: Overtime. She appears to like shotguns a lot, as she was armed with a Mossberg 500, a SPAS-12 and in DOTM: Overtime, after taking a Beneli M from one of the dead Police Officers, hearts are seen floating around her as she takes a liking to it.