Fighters are randomly generated NPC civilians who will be able to join you as a disposable Guns for Hire whenever you encounter them across Hope County. You can recruit up to three in your army at any one time, and each once can be leveled up twice to gain up to two, randomly selected perks that can boost both you and them whenever they’re with you.

To level up, a Fighter needs to get 5 kills to unlock their first perk and 12 kills to unlock the second, so sic them on enemies and keep an eye on their kill count in the roster menu to gain access to those perks as quickly as possible. Some of their buffs, like Vulture (will find extra stuff when looting) can be super handy, so it’s worth focusing on this mini progression system whenever possible.