Because you like Bellatrix Lestrange in Harry Potter Series

In a group of self-serving career climbers, Laurel Castillo is the only one who wants to serve others. See them in How to Get Away with Murder.

Elio Perlman likes the piano, peaches, and his father's new research assistant a little too much. See them in Call Me by Your Name.

Bella Swan thinks of it as her job to help her parents and protect her friends, even though it often ends up the other way around. See them in Twilight.

Britta Perry has never met a cause she couldn't passionately champion—at least for a little bit. See them in Community.

Terence Fletcher is a brutal and unflinchingly strict music teacher hell-bent on whipping his students into shape. See them in Whiplash.

Tom Hansen is a full-fledged romantic impatiently waiting for his love story. See them in (500) Days of Summer.

M. Bison is a diabolical megalomaniac hell-bent on dominating the world. See them in Street Fighter.

Mark Sloan is the best plastic surgeon and biggest playboy the hospital's ever seen. See them in Grey's Anatomy.

Ramona Flowers is a delivery girl who's been through her fair share of bad breakups. Super-bad breakups! See them in Scott Pilgrim vs. the World.

Though seemingly caring and calm, this motel owner has a mysterious streak of intensity. See them in Psycho.

Nina Sayer finally landed the role of prima ballerina, but as tension ramps up in rehearsal, she starts losing her mind. See them in Black Swan.

A powerful mob boss, Vito Corleone is always making offers people can't refuse. See them in The Godfather.