She should just do system exchanges. For example, if you use the system to buy a knife, the knife might disapear but the things you carved out of the knife wont.
So if she used the system to obtain stuff from this world, she can use them as trump cards.
@LGear
I read the comments and if those comments are true then apparently;
1) it had to be wrap up/ended due to it being receptive to democracy? Not sure how true it is but basically it also got intervene, just for a different reason. Again, if this is true.
2) It doesn't have yuri or shoujo ai tag and the relevant characters are apparently just side characters? I don't read so I'm not sure. Maybe you can share which chapter you are referring to?
It would be nice if Lüxia would take the girl with her when everything is over... Tho I wonder if someone with such a high sense of justice could fit in? Or it's just that Lüxia's way of doing things are a little bit... Unorthodox?