Because you like Sugar "Kane" Kowalczyk in Some Like It Hot
Konata Izumi has a live-now, worry-later view of the world. See them in Lucky Star.
Benji Applebaum is not a total nerd. He also happens to be super into magic. See them in Pitch Perfect.
Light Yagami has a plan to make a better world, and morals won't stop him. See them in Death Note.
People think that because Tris is small, or a girl, or a Stiff, she can't possibly be cruel. But they're wrong. See them in Divergent.
A cocky surgeon, Stephen Strange is learning that magic is more real than he could ever imagine. See them in Marvel Cinematic Universe.
He's a troubled insomniac in search of a moment to rest and a meaning to his existence. See them in Fight Club.
His murderous megalomania aside, Loki is quite charming. Just don't mention his strapping older brother; he's a tad jealous. See them in Marvel Cinematic Universe.
The son of Death has an obsession with perfection and symmetry. See them in Soul Eater.
Artemis Fowl understands the way of the world. If he wins, he's a prodigy. If he loses, then he's crazy. That is how history is written. See them in Artemis Fowl.
Misato Katsuragi is never without a beer in her hand or her pet penguin by her side. See them in Neon Genesis Evangelion.
He may seem like a charismatic leader, but Bellamy also has a ruthless, self-serving streak See them in The 100.
An escaped convict on a mission, Sirius Black is brooding, brave, and reckless. See them in Harry Potter Series.