Is she going to a character open call, or is it a specific face character audition?
I'm going to assume it is probably an open call, which means that PPs are quite correct about expecting to dance. They will teach a basic character routine that is pretty easy if you have a lot of dance experience, but can be a lot harder if you do not.
Then they do an animation bit. Sometimes they just tack it on to the end of the dance, like:
For the last two counts of eight, you will pretend that you are at the beach (or something like that).
Sometimes it is separate from the dance and they will just give you a character and a situation to act out. "Minnie Mouse making a birthday cake"
For face characters, the most important thing is obviously her look and her HEIGHT. Height is a big one. She could be the spitting image of Belle, but if she is 5'8", she doesn't stand a chance!
If they feel she has the right look and she is the correct height, she will be pulled aside and they will wig her right there. Then they take pictures of her in the various wigs.
Things to remember:
As others have said, it can be a VERY long day, so be prepared for that.
Also, does she know that almost ALL face characters do fur costumes as well? Does she want to do that?
It's important to smile A LOT and have lots of energy.
Best of luck to her!!
The character department can be very rewarding
