3D Charater Menu Screen

I definitly agree with your ideas !
It would make the menu more living and entertaining in my opinion. Basically, when you have a character in motion in the menu, you're the curious to experience what she can do ! I think it's a good point so people can have a little more fun in the menu. I guess it can be pretty easily made.

Other thing is, I would love to see her different skins in menu, instead of going back to the game to see what has changed. Besides, you can have a bigger view of equipments / skins changes this way.

I think that the Familiar should kinda hover around Miriam in circles, unless it's one that is on the ground, in which case it won't be shown at all. Some ideas could be like the Owl Familiar in Order of Ecclesia, where when Shanoa stands idle for long enough, they swoop down and perch on her shoulders, I think something like that would be cool.

Or if there WAS a crawling familiar, like a chameleon or a spider of some kind, when opening up the menu screen, the familiar will be seen crawling up Miriam's body, and (in the chameleon's case) wrapping itself around Miriam's torso, or maybe (in the case of a spider) it could be seen coming down from the ceiling on a thread of silk, to land on Miriam's head, and Miriam will look up slightly annoyed, and then go back to her default position.

Something like that would be HELLA impressive, I think. :p