Because you like Clark Kent in Smallville
Living with a curse, Kyo Sohma is sick of being treated like garbage his whole life. See them in Fruits Basket.
A genetic experiment engineered to be the perfect assassin, Agent 47 is cold, professional, and lethal. See them in Hitman.
With her consciousness so easily shifted between bodies, Motoko Kusanagi is left unsure of who or what she really is. See them in Ghost in the Shell.
A machete-wielding mass-murderer, Jason Voorhees is a terrifying blank slate. See them in Friday the 13th.
Mike Ehrmantraut is rutheless, merciless, and probably the most endearing hitman you've ever met. See them in Breaking Bad.
While Fantine's gentleness has led others to take advantage of her, it ultimately forces her to become stronger. See them in Les Miserables.
Sarah Ashburn lives life by the book and has trouble getting along with anyone who doesn't do the same. See them in The Heat.
Hawkeye is most comfortable perched above the action, keeping an eye on everything and using a well-timed arrow to save the day. See them in Marvel Cinematic Universe.
The Terminator is an emotionless killing machine who won't stop until he's changed the future. See them in The Terminator.
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.