Because you like Dr. List in Marvel Cinematic Universe
Sometimes being a supportive girlfriend like Ophelia doesn't work out too well. See them in Hamlet.
Bran Stark discovered a scandelous family secret. He swore to keep quiet but soon found himself on the receiving end of attempted murder. See them in Game of Thrones.
Caitlin Snow believes that burying herself in science is the best way to save the day or to mend a broken heart. See them in DC Extended Universe.
Though he may be blind, Chirrut Imwe sees the power of the force more than most. See them in Rogue One.
A reclusive introvert, Liz Sherman has a temper that's literally lethal. See them in Hellboy.
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.
Foggy Nelson is a principled small-time lawyer fighting for fellow little guys. See them in Marvel Cinematic Universe.
The destroyer, Drax lives for one thing and one thing only: revenge. See them in Marvel Cinematic Universe.