Because you like Tommy Pickles in Rugrats
There's nothing like discovering dear old dad is a serial killer to send you into an (understandable) funk. See them in Hannibal.
A bloodsucker, Carlisle Cullen is actually more likely to give you a blood infusion. See them in Twilight.
Kenzo Tenma would have never guessed that ten-year-old he saved would later become a deadly serial killer intent on "thanking" him. See them in Monster (TV Show).
A compassionate medical student, Martha Jones has found a Doctor she can really look up to. See them in Doctor Who.
Yes, she's an "older" woman, but that just makes Mrs. Robinson sexier and more seductive. See them in The Graduate.
Formerly a "sweater-set-wearing, mojito-drinking sorority girl", Paige Collins is now a successful sculptor with slight memory loss. See them in The Vow.
Jason Bourne is suffering amnesia, but considering what he's done as a CIA assassin, maybe that's for the best. See them in The Bourne Identity.
Pepper Potts can run a company, manage an egomaniac, and take down bad guys, all without breaking a sweat. See them in Marvel Cinematic Universe.
Dr. Gordon Freeman is a brilliant physicist is a quiet hero. And given all the violent aliens, he better be. See them in Half-Life.
Everything is fascinating to Octavia Blake who has been locked away for her entire life. See them in The 100.
Mitchell Pritchett prefers to have a place for everything and everything in its place. See them in Modern Family.
Talking to a stranger on a train is the best decision Jesse Wallace ever made. See them in Before Sunrise.