Because you like Woo-jin Lee in Oldboy

Roger is a pansexual alcoholic non-human who will happily lie, cheat and steal to get what he wants. See them in American Dad!.

Clarice Starling is patiently working with one serial killer to stop another. See them in The Silence of the Lambs.

A born psychopath, don't expect Michael Myers to understand the difference between right and wrong. See them in Halloween.

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

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.

A no-nonsense professor famous for her strictness, Minerva McGonagall only shows her warmer side to those closest to her. See them in Harry Potter Series.

GLaDOS will supply the food when you get together: a delicious cake. Of course, it could just be a trap so she can kill you. It’s hard to say. See them in Portal Series.

Insightful about everyone else's neuroses, Rose Lalonde is not as aware of her own. See them in Homestuck.

Greenpeace? No, this brave eco-terrorist is waging Greenwar. See them in Final Fantasy Series.

Lelouch vi Britannia is a high school student by day, masked destroyer of tyrannical empires by night. See them in Code Geass.

Driven and straightforward with high-technology parts, EVE was sent to Earth to see if it is habitable. See them in WALL-E.

Everyone is just a chess piece, and Izaya Orihara is a master player. See them in Durarara!!.