Because you like Xander Harris in Buffy the Vampire Slayer
Toby Cavanaugh has trouble avoiding being manipulated. See them in Pretty Little Liars.
Tina Goldstein is better at getting the job done than following the rules. See them in Fantastic Beasts and Where To Find Them.
Benoit Blanc is Sherlock with Southern charm, and a mysterious benefactor. See them in Knives Out.
A no-nonsense pro, Agent K has dedicated his whole life to his job. See them in Men in Black.
People think Karen Smith is a dumb blonde, but she disagrees and is proud she can predict the weather with her breasts. See them in Mean Girls.
David Rossi may chase serial killers for a living, but he's more interested in what wine pairs well with tonight's parmigiana. See them in Criminal Minds.
Count Olaf is a traveling actor, except he can't act and his homicidal tendencies make finding work pretty difficult. See them in Lemony Snicket's A Series of Unfortunate Events.