Because you like Bellatrix Lestrange in Harry Potter Series
For somebody who won't answer questions, the enigmatic C.C. sure asks a lot of them. See them in Code Geass.
An alien, a time-traveler, and an esper are following Haruhi Suzumiya, who – unknown to herself – is a near-omnipotent reality warper. See them in The Melancholy of Haruhi Suzumiya.
Community-driven but practical, Calvin Palmer is a natural leader even if he doesn't always see it. See them in Barbershop.
Ted Logan wants to party on, but if doesn't get an A+ on his history presentation, he'll flunk out and be sent to a military school in Alaska. See them in Bill & Ted's Excellent Adventure.
Raz is a 10-year-old boy who mostly stays in his own head, which makes sense since that's where he is strongest. See them in Psychonauts.
Combining an innocent face with an insatiable bloodlust, Eli recruits friends to join the vampire way of life. See them in Let the Right One In.
This high school queen bee has everything, including a genius-level IQ—a fact Lydia Martin keeps hidden to maintain her image. See them in Teen Wolf.
Motivated by a strong sense of curiosity, fleet-footed Lina Mayfleet is happiest when she's on the move. See them in The City of Ember.
An inquisitive archaeologist, Professor Hershel Layton knows a gentleman leaves no puzzle unsolved. See them in Professor Layton.
Though he has a brilliant mind for mathematics, Christopher has a much harder time processing the rest of the world. See them in The Curious Incident of the Dog in the Night-Time.
Hiccup Haddock III may be the only Viking nerd in recorded history. See them in How to Train Your Dragon.