Sonja Bake

Sonja Bake is a gunwoman and a member of Vanishing Bunny. Sonja's parents worshiped guns and imparted their beliefs on her, training her to shoot from an early age. After Vanishing Bunny rescues Spike (who'd been thrown off the Flying Pussyfoot), Sonja begins training under him as a sniper. (Source: Baccano! Wikia)