Because you like Ianto Jones in Torchwood

How is angel Aziraphale supposed to stop the apocalypse when Hell's forces misplaced the Antichrist somewhere? See them in Good Omens: The Nice and Accurate Prophecies of Agnes Nutter, Witch.

Britta Perry has never met a cause she couldn't passionately champion—at least for a little bit. See them in Community.

Sydney Bristow is a kick-ass double agent on a mission for revenge. See them in Alias.

A brilliant graduate student in Italy for "research," Oliver has other things on his mind: flirting, swimming, and dancing. See them in Call Me by Your Name.

With each reboot, Janet progresses more and becomes capable of human emotions. See them in The Good Place.

Villanelle is a hired assassin who loves committing murder as much as she loves dressing up in fancy pink ballgowns. See them in Killing Eve.

Henry Mills is an idealistic young boy with the heart of the truest believer. See them in Once Upon a Time.

Michael Moscovitz is a high school student of few words but a lot of heart. See them in The Princess Diaries.

Nicholas Angel is super-dedicated to his job as a police officer. Maybe a little too dedicated. See them in Hot Fuzz.

Often on the verge of a nervous breakdown, Annie Edison nevertheless manages to be the brain of the Greendale study group. See them in Community.

Gruff and sarcastic, Detective Harry Dresden use unconventional ways to track down perps, including using magic and the supernatural. See them in The Dresden Files.