Anton Gris works as a coach and trainer within Louis Bouchard's organisation, training boxers in the gym in St. Aicard's Church. He was originally recruited in Marseille. He was brought to Paris by Bouchard when operations expanded into the capital.

When the player talks to him for the first time, they can bet with him on which fighter would win a boxing match - Zak or Carl. He asks for the player to bet €200. If the player wins, he gives them his Gold Chain, which can be pawned in Rennes' Pawnshop.