When provoked, he can become very dangerous to enemies, using his immense strength and weight to smash enemies to the ground or tear them apart. Similarly to Barney Calhoun, he provides much comic relief throughout the games, with his quirks and many strange and odd decisions.
He has been programmed to be playful, but also ardently loyal to Alyx, acting as both a pet and bodyguard. Dog was created by Eli Vance more than almost two decades ago to both celebrate and protect his daughter, Alyx Vance.
