Because you like Ann Smith in Roman Holiday

L is enigmatic, child-like, and one of the smartest people in the world. See them in Death Note.

What Ron Weasley lacks in motivation and book smarts, he makes up for in loyalty and street smarts. See them in Harry Potter Series.

Hell hath no fury like an evil fairy scorned. See them in Maleficent.

A wildly brilliant detective, Sherlock Holmes can figure out everything except how to interact with other human beings. See them in Sherlock.