Charlie is the leader of the squad thanks to his outstanding tactical sense and his unfailing coolness.
Emma is Charlie's girlfriend. It was Charlie who got her into video games, and over time she developed a gift for first-person shooters, and in short, she never misses.
Sam is the tank of the squad thanks to his size and his imposing corpulence, he is the perfect tank.
Alex is the free electron of the team, she sneaks into the enemy ranks to assassinate them behind their backs, a real calamity.