Because you like Princess Bubblegum in Adventure Time
Roger is a pansexual alcoholic non-human who will happily lie, cheat and steal to get what he wants. See them in American Dad!.
For someone who swears she doesn't care for anyone, MJ Jones spends a lot of time observing her classmate Peter Parker. See them in Marvel Cinematic Universe.
Luke Danes will serve you coffee and always be there for you to help out. See them in Gilmore Girls.
What Mako Mankanshoku lacks in common sense, she makes up for in sheer optimism and force of personality. See them in Kill la Kill.
Deadpool thinks life is an endless series of train wrecks with only brief commercial-like breaks of happiness. See them in Deadpool.
Beloved by all, Lucy is the most corageous Pevensie. See them in The Chronicles of Narnia.
Insightful about everyone else's neuroses, Rose Lalonde is not as aware of her own. See them in Homestuck.
A brave but pessimistic nobleman, Boromir knows one does not simply walk into Mordor. See them in The Lord of the Rings.
Harrison Wells is a brilliant scientist full of secrets. See them in DC Extended Universe.
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.
Louis de Pointe du Lac is wanting to find a way of living that doesn't make him miserable. See them in Interview with the Vampire: The Vampire Chronicles.
A librarian and aspiring Egyptologist, Evie O'Connell would rather have her own adventures than just read about them. See them in The Mummy.