Because you like Rupert Giles in Buffy the Vampire Slayer
People make more sense to the hyper-logical Temperance Brennan after they're dead. See them in Bones.
Claire Standish is a popular, perfect princess who's deeper than she seems. See them in The Breakfast Club.
Burton Guster is a level-headed investigator with a "Super Sniffer" nose. See them in Psych.
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.
Egon Spengler prefers collecting spores, molds, and fungus to interacting with people. See them in Ghostbusters.
Victor Frankenstein can create life, so he's pretty awesome if he says so himself. See them in Frankenstein.
It's hard enough for Marta Cabrera to be part of a murder investigation, but when you can't lie? See them in Knives Out.
Luke Danes will serve you coffee and always be there for you to help out. See them in Gilmore Girls.
Merry Brandybuck is a troublemaking hobbit with a brave streak that some might call foolhardy. See them in The Lord of the Rings.
Ursula will oh-so-generously grant your wishes for a price. See them in The Little Mermaid.
A kind, sensitive medical intern doing the best he can, George O'Malley sometimes struggles to keep up. See them in Grey's Anatomy.