My memory's kind of bad but weren't the professors the ones that could create homunculus?
Not too sure on the mage. Given that the default char, I guess she's supposed to be a high priestess? I'm pretty sure regular priests couldn't cast offensive spells, but again, I didn't play Ragnarok too much. It might be more of a thing to make her play more 'Castlevania' though. Anyways, getting back to the point, she can already cast magic herself, I'm not too sure what kind of skill set they'd give to the mage, because of that.
So, I'm not sure what the mage's gimmick would be even if she's put in, probably having most of the priestess' sub-weapons minus the cross things and replaced maybe with, I don't know, something silly like Meteor Storm, either that or she might play more like the secondary/unlockable characters of the Castlevania games, maybe like Maria or certain other examples.