Because you like Nanny McPhee in Nanny McPhee
Leonard Hofstadter is the normal one among his scientist friends, though in fairness that's a low bar. See them in The Big Bang Theory.
England may cultivate the image of a well-bred gentleman, but he has both the temper and mouth of a seasoned sailor. See them in Axis Powers Hetalia.
A scary monster on the outside, James P. Sullivan is really a softie on the inside. See them in Monsters, Inc..
Margaery Tyrell is one of the most adept and charming liars there is. See them in Game of Thrones.
On the bright side, Mindy Lahiri is always willing to volunteer her opinion. On the dark side, this doc’s prescriptions can be misguided and shallow. See them in The Mindy Project.
An opinionated pothead with a passion for conspiracy theories, Steven Hyde is secretly more sensitive than he lets on. See them in That '70s Show.
Donna is boisterous and spunky traveller of the TARDIS, exploring worlds beyond the simple mundane enterprises of Earth. See them in Doctor Who.
Resourceful and courageous, Chun-Li is dedicated to using her considerable strengths against evil. See them in Street Fighter.
Disgust is a friend who makes sure you stay away from all things gross. See them in Inside Out.
A tough tomboy with a protective streak, Maximum Ride is a human-bird hybrid. See them in Maximum Ride.
It turns out Dracula's son Alucard has some pretty severe daddy issues. See them in Castlevania.
The irrepressible Lucy Ricardo has never met a challenge she couldn't scheme her way into or out of. See them in I Love Lucy.