Because you like Russia in Axis Powers Hetalia
Sheldon Cooper is brilliant in every way except, well, interacting with any human being. See them in The Big Bang Theory.
If you need her, Lisa Simpson will be in her room with her saxophone and a good book. See them in The Simpsons.
While Alan Garner is loyal to his new friends, his efforts to help them often do more harm than good. See them in The Hangover.
The Terminator is an emotionless killing machine who won't stop until he's changed the future. See them in The Terminator.
Barbara Kean is loving, selfless, and caring. But, she's less stable than she'd like to admit. See them in Gotham.
Don't worry about this forensic scientist offing you unless you're a serial killer yourself. (You're not, right? Just checking.) See them in Dexter.
Elaine Benes is a tough New Yorker who can hang with the guys, and date the ones who are "sponge-worthy." See them in Seinfeld.
A cursed pirate captain, Barbossa is greedy, vengeful, and surprisingly cheeky. See them in Pirates of the Caribbean: the Curse of the Black Pearl.
Brilliant, violent, and only a little insane, the Joker doesn't listen to anyone except the voices in his head. See them in DC Extended Universe.
Hiccup Haddock III may be the only Viking nerd in recorded history. See them in How to Train Your Dragon.
Tony Stark's interests include cocktails, beautiful women, particle physics, and saving the world. See them in Marvel Cinematic Universe.