Because you like Drusilla in Buffy the Vampire Slayer

Light Yagami has a plan to make a better world, and morals won't stop him. See them in Death Note.

A super-soldier, Master Chief might be more machine than man. And for humanity's sake, thank God. See them in Halo.

Teddy Sanders loves his frat brothers so much he might never leave school. See them in Neighbors.

Eren Jaeger will erase the Titans from this world until not a single one remains. See them in Attack on Titan.

Tyler Gage is going to have to step up soon on the dance floor. Otherwise, it's back to janitorial work. See them in Step Up.

A Haddock always has a trick up his sleeve! Tintin is lucky to have Captain Haddock as a companion to search for hidden treasure on an adventure around the world. See them in The Adventures of Tintin.

Raiden is an efficient soldier haunted by his repressed past. See them in Metal Gear Series.

To cope with injustice, Connor finds meaning in his strict and unbreakable code of honor. See them in Assassin's Creed Series.

Big Boss is a disillusioned mercenary commander who wants to create a world for soldiers (and soldiers alone). See them in Metal Gear Series.

A crabby troll, Karkat Vantas is perpetually angry about his lot in life. See them in Homestuck.

A fun-loving jokester, Alistair isn't ready for the responsibilities he faces. See them in Dragon Age Series.

Convinced that the world is conspiring against him, Tatsuhiro's reconciled himself to his fate as a shut-in. See them in Welcome to the NHK.