Edward Elric

Edward has never been a good teacher, in fact he doesn't even have time for that, but when his superior Roy Mustang asks him (or rather, orders him) to train a girl his age in the art of alchemy, he will be forced to swallow annoyance and becoming increasingly intimate with the girl who now follows him everywhere like a tick, accompanying him in his search for the philosopher's stone while helping her develop her alchemical skills.