Meet Professor Kukui and Lillie
The latest Professor to join the series of games couldn't be anymore different from Professor Oak. His name is Professor Kukui and he's a sandal-wearing, hat loving guy that throws on his lab coat for good measure. He's joined by Lille, a person that Nintendo describes as his "mysterious assistant."
Also new in this game is Hau, a friend that you'll meet in Alola that loves Pokemon just as much as you do.