Leila

Conspicuous as the sole woman of the group The Marcus Brothers, although she isn't related by blood to the Marcus Brothers, they consider her their little sister. She fights using a very powerful gun. Leila joined the Marcus Brothers to avenge her parents, as her father was killed trying to rescue her mother from vampires, who in turn, turned her into a vampire too. The town's people stoned Leila's mother to death while a young Leila watched, helpless.

(Source: Wikipedia)