(Viper used to be a volunteer and fought with the republic but then he changed sides, so no he's not apart of them. And his armour resembles Jango Fetts)
Viper felt the building move and saw someone free fall.
"Mad" he muttered
He stayed close to the ground as the building sunk. When he was sure Alpha sqaud had made a move he followed. He entered the tunnels leading to the facility. He started walking casually. He had no need to cautious until he got within firing range of Alpha squadron. He continued. He could hear the sounds of droids. He sank into the shadows and watched as a spider droid moved towards Alpha squad....
I know what you're thinking, I know how you're feeling, Believe me. You're not alone.