Because you like Master Chief (John-117) in Halo
Caitlin Snow believes that burying herself in science is the best way to save the day or to mend a broken heart. See them in DC Extended Universe.
This barber doesn't cut hair. Sweeney Todd sends his clients down a chute to be baked into his partner-in-crime's pies. See them in Sweeney Todd: The Demon Barber of Fleet Street.
Percy Jackson is an ordinary student thrust into the world of myth come alive. See them in Percy Jackson & The Olympians: The Lightning Thief.
A sadistic sociopath, Lil Z is helping make the City of God slum a Hell on Earth. See them in City of God.
Anya Jenkins has a real harsh bark to go with her demonic bite. See them in Buffy the Vampire Slayer.
Although Penny's friends have genius-level IQs, they regularly come to her for advice and insight. See them in The Big Bang Theory.
The adventurous daughter of Port Royal's governor, Elizabeth Swann would rather conspire with pirates than sit pretty in her corset. See them in Pirates of the Caribbean: the Curse of the Black Pearl.
Severus Snape is a misanthropic potions teacher with a vindictive streak. See them in Harry Potter Series.
Light Yagami has a plan to make a better world, and morals won't stop him. See them in Death Note.
A responsible kid, Hugo Cabret is still capable of flights of fancy. See them in Hugo.
A scary monster on the outside, James P. Sullivan is really a softie on the inside. See them in Monsters, Inc..
