Because you like Agent K in Men in Black
Frederick Frankenstein is an eccentric (O.K., maybe a little insane) professor who is excited to be delving into his family's past. See them in Young Frankenstein.
A librarian and aspiring Egyptologist, Evie O'Connell would rather have her own adventures than just read about them. See them in The Mummy.
Klaus Baudelaire's photographic memory saves the lives of his siblings many times over. See them in Lemony Snicket's A Series of Unfortunate Events.
A scary monster on the outside, James P. Sullivan is really a softie on the inside. See them in Monsters, Inc..
A brave but pessimistic nobleman, Boromir knows one does not simply walk into Mordor. See them in The Lord of the Rings.
Leslie Burke is bold, courageous, and imaginative enough to create a world from scratch. See them in Bridge to Terabithia.
A Silurian lizard woman, Madame Vastra has a penchant for puzzles and interspecies romance. See them in Doctor Who.
Samwell Tarly is a scholar, not a fighter. But that's not good for an aspiring member of the Night's Watch. See them in Game of Thrones.
On the outside, Gwen seems meek and calm. But she has an inner core of steel. See them in Merlin.
Jean-Baptiste Grenouille may have a phenomenal sense of smell, but he has a weak sense of morality. See them in Perfume: The Story of a Murderer.
Obi-Wan Kenobi is a sage Jedi who doesn't need to say much to teach you a galaxy's worth of wisdom. See them in Star Wars Series.