Chopper was a spiky-haired mercenary who worked for McKenas Cole.
Season 1
Chopper was first seen with Cole and his squad, running into the facility through a secret passageway. Chopper snapped an SD-6 agent's neck and he and the other mercenaries entered the headquarters. Chopper was seen again with some of his friends like Endo and Tchen guarding the captured SD-6 employees.
Chopper met his end when Sydney and Jack rescued their friends and started killing the mercenaries. Just when Chopper was about to kill Sydney, Marcus aquired a handgun and shot Chopper in the chest.