Because you like Tommy Pickles in Rugrats
Pro: Johan Liebert is handsome and charming. Con: he's also a sociopathic killer. See them in Monster (TV Show).
When Rin Matsuoka is not swimming, he mostly spends his time brooding or listening to angry Dubstep. See them in Free! Iwatobi Swim Club.
Clary Fray's philosophy: dive into the supernatural underworld first and ask questions later. See them in City of Bones.
Damon Salvatore used to miss being human. Now he can't think of anything more miserable. See them in The Vampire Diaries.
For someone who swears she doesn't care for anyone, MJ Jones spends a lot of time observing her classmate Peter Parker. See them in Marvel Cinematic Universe.
Other people's opinions have never mattered much to Haruka Nanase, and they aren't going to start to do so now. See them in Free! Iwatobi Swim Club.
Ciel Phantomhive is a haughty teenage nobleman who doesn't suffer fools gladly. See them in Black Butler.
Empathetic Nausicaa embraces all forms of life, even those that might scare other people. See them in Nausicaa of the Valley of the Wind.
Joel is a hardened, jaded survivor who keeps finding things to fight for. See them in The Last of Us.
After becoming accepted into the group of popular girls, Tracy Freeland has turned from a sweet and reserved teenager into a monster. See them in thirteen.
There are certain souls the surprisingly sensitive Death would rather not reap. See them in The Book Thief.