Because you like Abbie Mills in Sleepy Hollow

Chuck Bartowski is a sweet, laid-back electronics store/top secret government employee. See them in Chuck.

Alex Danvers is a brilliant engineer tasked with alien threats, and one of those aliens is her adopted sister Supergirl. See them in Supergirl.

Javert is an inspector with a single-minded focus: to bring criminals to justice. See them in Les Miserables.

Although she is underestimated, Lagertha never fails to prove her worth as both a warrior and a mother. See them in Vikings.

Jo Wilson is an accomplished doctor who's getting over her past. See them in Grey's Anatomy.

A suave manipulator, Sebastian Valmont is valiantly fighting off a developing conscience. See them in Cruel Intentions.

A Silurian lizard woman, Madame Vastra has a penchant for puzzles and interspecies romance. See them in Doctor Who.

Arwen has to choose between a life of loneliness or love and inevitible death, both rather unfortunate options. See them in The Lord of the Rings.

Helena is a mentally unstable, childish, and completely merciless. And most of all, she's an unstoppable killer. See them in Orphan Black.

Emma Frost's superpower: transforming her body into an unbreakable diamond. See them in X-Men Series.

Arizona Robbins loves being a pediatric surgeon, and the cute orthopedic surgeon downstairs makes coming into work worth her while. See them in Grey's Anatomy.