Her personality can seem a little off the wall, but you underestimate her to your own risk. She'll also be rather enthusiastic about helping your character and Professor Grabiner if you end up married, planning everything down to your dress and the ceremony itself. She'd even go so far as to ask you whether or not you want to stay in the academy in the holidays so that you can have some time to get to know each other outside of the class environment, much to the player character's embarrassment. She's rather openminded about many things, and has a long list of endearments to call her students.
It seems to be a bit of a running joke in-game that she would give a sex education talk in Green/White magic class, and will finally get around to it in February in a rather roundabout way.