Basically,

You grimm comes and attacks Mantle etc etc.

Penny shows up.

Then comes a familiar Cat faunus (JULIA)
out of sight.
She was here the whole time
(Left after Volume 6 and found a different way to Atlas. She has ways.)

Then you got arrested by the Ace people and she almost did but caught it with one arm.

Blah blah

What do you do?

This was quick so therefore it is crappy.

It is 9 pm and I have no patience to get this out so here you go