Speedy Dave

Speedy Dave, known as Daisuke Hayami (速見ダイスケ) in Japan, is the operator of QuickMan.EXE and was a member of Gospel in MegaMan Battle Network 2 that attempted to explode the Okuden Dam with four bombs because people were littering (although that's probably a lie because he's working for Gospel), but was stopped by Lan.

MegaMan NT Warrior
Speedy Dave was featured in an episode of the anime. He was a childhood friend of Sal's, and loved nature just as much as she did. However, he sought to protect nature so much that he joined Gospel to do it. Under the name of "Earth Avenger", he was ordered by Gospel to destroy the dam, and attempted to do so by reversing the spinning of the turbines. After Quickman was disarmed by Megaman,  Dave 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. After Megaman thwarts Cutman's attempt to finish the job, Dave leaves but not before saying goodbye to Sal.