Miss Juniper for sure. Though Im partial to first Gen and Oak, if not for Miss Juniper, Black/White and Black/White 2 wouldnt haave happened. Because she made up the story to get us traveling and exploring the world, our characters could become Trainers, even if Biancas father didnt want to accept that at first.
Of course, Sycamore is cool too. Hes the only Professor we could battle legitimately (Oak was an actual trainer in Red/Blue/Yellow with a real team).
3DS FC: 2766 8833 2773 Only Friend Zones with Fire - Braixen, Dragon - Sliggoo and Ghost - Shuppet Will not respond to PMs not listing Friend Zone type