Francis

Francis is one of the Survivors, a tattoo-covered biker. He knew Bill before the outbreak of infection as well, which may mean they both went to Vietnam, but is unlikely since Francis appears much younger than Bill. Since his character model has changed, it has been speculated that Francis' new face was modeled after the head developer of the game, Mike Booth and that he has the Lambda symbol from Half-Life cut into his hair. In official media, he is always seen wielding either a pump shotgun or auto shotgun.

Official description
Cocky, loud, and pretty sure he's indestructible, Francis acts like the zombie apocalypse is the world's biggest bar fight. When the virus hit, everybody else stockpiled food and looked for a place to hide. Francis found a gun and had some fun. No cops, no laws, no order—if it wasn't for all the zombies, he could almost get used to life like this.