Because you like Lady Macbeth in Macbeth

The vampire that killed Zero Kiryu's family also infected him, and he starts to crave blood, much to his horror. See them in Vampire Knight.

Titus Andromedon will show you the ropes, help you with your problems, and sing at you constantly, whether you like it or not. See them in Unbreakable Kimmy Schmidt.

Sylar's victims are found all over the country, many with their brains removed. See them in Heroes.

A natural leader, Clarke Griffin dispenses both justice and mercy, and she does it all while being selflessly humble. See them in The 100.

Introspective Theodore Twombly would rather observe life than participate in it. See them in Her.

A powerful dragon-hunting warrior, Dovahkiin is destined for great things. See them in The Elder Scrolls V: Skyrim.

Phoebe Buffay works as a masseuse while attempting to put her spark in a world where everyone else’s seems to have dulled. See them in Friends.

A loyal dinosaur, Yoshi loves both saving the day and chowing down on a good meal. See them in Super Mario Bros..

Whatever Sakura Haruno lacks in power, she makes up for in intelligence and bravery. See them in Naruto.

Raised to happily follow the rules, Cassia might actually be more rebellious than she thinks she is. See them in Matched .

With great power comes great responsibility, but Peter Parker always seems to get the short end of that bargain. See them in Marvel Cinematic Universe.

Regina Mills is a cold evil queen turned chilly town mayor. See them in Once Upon a Time.