Because you like Brom in Eragon
Cyclops shoots lasers out of his eyes, destroying anything in his line of sight. See them in X-Men Series.
Hank McCoy is a quintessential nerdy scientist but with a few rather unconventional physical attributes. See them in X-Men Series.
Boomerang is equally skilled at tossing boomerangs and tossing back beers. See them in DC Extended Universe.
Jane Smith is a stone-cold killer, but you would never know it from looking at her. See them in Mr. & Mrs. Smith.
Christine Daae has been secretely taking lessons from a phantom musician. It sounded less creepy in her head. See them in The Phantom of the Opera.
There's more to this sweet, caring landlady than meets the eye. See them in Sherlock.
Don't let his old age fool you, Heihachi Mishima is a ruthless pragmatist who values self-reliance above all else. See them in Tekken .
Irene Adler has to use both her brains and her body to survive. Luckily, she's usually the most brilliant person in the room. See them in Sherlock.