He was a childhood friend of Sal and loved nature just as much as she did. As a kid, Dave vowed to Sal that he will someday grow up to be a park ranger so that he could help preserve the natural environment. Sal has always been supportive of Dave's idealism, and is also shown to have a crush on him when she introduces Dave to her friends while blushing and stuttering. Dave sought to protect nature so much that he joined Gospel to do it. Under the name of "Earth Avenger", he was ordered by Grave to destroy the dam, and attempted to do so by reversing the spin of the turbines. Sal attempts to stop her friend, but is defeated and becomes his hostage. After QuickMan was disarmed by MegaMan, Dave unties Sal and reveals that he was merely bluffing and was only trying to scare the people in charge of the dam to take better care of nature.