Professor Rowan’s been my favorite for a while now. The simple reason is that this guy will NOT take crap. And the way in which he doesn’t take it is amusing.
Example, in response to Team Galactic trying to threaten him:
"Quiet, you lot! Why must you be such a nuisance? Let me list some lessons you still need to learn. #1: Don’t loiter about for no good reason. #2: Don’t interrupt others while they are attempting to converse. #3: If you don’t get your way, don’t raise your voice to be intimidating. #4: Don’t think you’ve grown strong just because you’re in a group. #5: What is with those outlandish outfits you have on? My goodness… You call yourselves adults? You kids, don’t grow up to be like these sorry specimens."
I rest my case.