LEFT 4 DEAD:

"Good thing I'm indestructible"

Francis is a biker, who worked as a bartender before the zombies came. He may be cocky but he is seeming a nice person though rough around the edges, and hates EVERYTHING.

LEFT 4 SPEED:

"Well, we're boned"

"Francis's cockiness makes him not a partner in the zombie situation. And he seems to be rather found of witches, though it leading to his death.