Because you like Tara Maclay in Buffy the Vampire Slayer
Wanting more out of life, Pam Beesly has a job she isn't crazy about and is engaged to a guy she's not sure is "The One." See them in The Office.
Anywhere there's adventure, Jaskier is there to write a catchy song about it. See them in The Witcher.
Kilgrave is a domineering, abusive boyfriend. Then, add in the power of mind control. See them in Marvel Cinematic Universe.
In constant agony, Ava Starr will do anything to give up the superpowers that are slowly killing her. See them in Marvel Cinematic Universe.
Blaine Anderson is a put-together prep school boy with the voice of an angel. See them in Glee.
Frederick Frankenstein is an eccentric (O.K., maybe a little insane) professor who is excited to be delving into his family's past. See them in Young Frankenstein.
Terry Jeffords (and his muscles) may look ferocious, but inside he's just a caring mama hen. See them in Brooklyn Nine-Nine.
Iris West is a barista and blogger determined to expose a secret. See them in DC Extended Universe.
Michael Bluth is the only sane person in a family of eccentrics. At least, that's how he thinks of himself. See them in Arrested Development.
Javert is an inspector with a single-minded focus: to bring criminals to justice. See them in Les Miserables.
Izzie Stevens is a model-turned-med student who can do it all, even if people underestimate her. See them in Grey's Anatomy.
