Because you like Alaska Young in Looking for Alaska
George Costanza is short, stocky, bald, neurotic, and the self-proclaimed "king of the idiots." See them in Seinfeld.
Insightful about everyone else's neuroses, Rose Lalonde is not as aware of her own. See them in Homestuck.
Mr. Robot always seems to know what to do when others are lost. But can he be trusted? See them in Mr. Robot.
Jin Kazama is a fearsome warrior torn between the darkness and the light. See them in Tekken .
The only defense Earth has against alien invaders are giant robots in the hands of pilots like Kaworu. See them in Neon Genesis Evangelion.
Eponine is a scrappy street urchin with a bad case of unrequited love. See them in Les Miserables.
Told her son will one day save the world, Sarah Connor dedicates her life to training him to do just that. See them in The Terminator.
Bedside manner is for chumps, not the brilliant Dr. Gregory House. See them in House M.D..
If you need her, Lisa Simpson will be in her room with her saxophone and a good book. See them in The Simpsons.
A few millennia in the mortal realm have caused DEATH to be quite enamored of life. See them in Discworld.