David "Davy" Ashleydale
From Page 3 of the rulebook, in the "End of the Game" section:
The Gunslinger prize is awarded to the player(s) who shot the most bullets (i.e., who has the fewest Bullet cards of their colour left). The player(s) turns his Character card over to get the prize. It is worth $1000. If more than one player wins the title, each tied player gets $1000.