Sergeant Sally

Sergeant Sally is a reckless gnomish police officer active in Gadgetzan in the Mean Streets of Gadgetzan expansion for Hearthstone.

Described as a "loose cannon" that has given every guard captain she's served under bouts of severe chronic heartburn, Sally is a "knee-high bundle of righteous fury" that doesn't give a second thought to political woes. All that matters to her is justice and achieving results by any means necessary. Her reckless attitude has seen her plastered with commendations throughout her career, but also almost countless charges of misconduct. Sally is "clearly crazy" and will often throw herself into seemingly unwinnable situations, relishing any challenge that comes her way. Strangely, no one knows where she came from; she simply appeared one day and started dispensing justice. While Gadgetzan's criminals mean that her job is never ending, there is no other place she'd rather be, exhilarated by the challenge of cleaning up the streets, and all criminals fear her and are quick to run if they catch a glimpse of her pink pigtails or the light emanating from her sirens.

Speculation
Judging by her burning blue eyes, her choice of attire and her reckless attitude, she may be a death knight.