Hey. Sorry for the necro, but I was hoping one of you could answer a question of mine.
That screenshot belongs to the silver haired elf's second class change menu. I made her an archer at level 5, for which I repent, but I now I'm faced with this dilema. And she's not the only one. While most units have only one or two classes available to promote, like the maid, many others have a ton of "locked" options. I thought it was a bug at first, but upon realizing that none of my units could promote to griffin rider I started wondering if perhaps griffins were locked behind story requirements or something.
So that's my doubt. Are some classes locked behind story requirements? Maybe it's level requirements? Is it just a bug and I'm wasting my time?