Because you like Rebecca Bunch in Crazy Ex-Girlfriend
Kyoya Ootori is possibly the only person who could reasonably go from VP of a school club to ruling the world. See them in Ouran High School Host Club.
The main priority for Nagisa Hazuki is making sure that everyone has fun. See them in Free! Iwatobi Swim Club.
Pro: Johan Liebert is handsome and charming. Con: he's also a sociopathic killer. See them in Monster (TV Show).
Level-headed Ian Gallagher may be focused on his goals, but he's got a mischievous side too. See them in Shameless.
A vampire hunter, Integra Hellsing doesn't tolerate failure, least of all her own. See them in Hellsing.
Living with a curse, Kyo Sohma is sick of being treated like garbage his whole life. See them in Fruits Basket.