Because you like Madoka Kaname in Puella Magi Madoka Magica

Harry Osborn is the privileged son of Oscorp's founder with a goblin-sized chip on his shoulder. See them in Marvel Cinematic Universe.

It's a race against time to develop his theory of the origins of the Universe before Stephen Hawking's body and mind give out. See them in The Theory of Everything.

Burton Guster is a level-headed investigator with a "Super Sniffer" nose. See them in Psych.

It doesn't matter how noble or brave he is. Jon Snow is a bastard, and people don't let him forget it. See them in Game of Thrones.

Amy Santiago likes following the rules a little too much. See them in Brooklyn Nine-Nine.

Although Thomas Sharpe is an English baronet, he doesn't have a Shilling to his name. He's in America to sell his invention and marry rich. See them in Crimson Peak.

Marshall Eriksen is a lawyer in love who is enjoying life. See them in How I Met Your Mother.

When he's not working as a detective, Lucifer is driving around in a black convertible or having one-night stands. See them in Lucifer.

Benoit Blanc is Sherlock with Southern charm, and a mysterious benefactor. See them in Knives Out.

A suave demon, Crowley grants humans their wishes in exchange for their soul, only to find loopholes that benefit him. See them in Supernatural.

The black sheep of his family, Rhett Butler grew up to have charm and to see things as they are. He just doesn't give a damn anymore. See them in Gone with the Wind.

Tom Hansen is a full-fledged romantic impatiently waiting for his love story. See them in (500) Days of Summer.