Because you like Amy Farrah Fowler in The Big Bang Theory

Detective Alec Hardy doesn't let anyone get too close to him. See them in Broadchurch.

Kazuma Kiryu's legendary strength and exploits have earned him the nickname of Dragon of Dojima. See them in Yakuza.

Cinder has been beaten down by the world, but she's learning that her cyborg abilities are pretty helpful. See them in Cinder .

Katsa is a strong-willed young woman with a deadly skill set. See them in Graceling .