Aside from the time when Evelyn asked her to help her when Edward came to visit, the Witch of Chaos has been doing nothing but meditating. She wasn't disturbed by anything that had transpired above ground, completely ignoring everything aside from her meditation.
But this was all possible because she had already done everything that she needed to do.
Now, it was only a waiting game for her.
Rex's part must be completed first before she can do her part in taking down the Executor.
It was all on his shoulders now or the plan would be a complete failure.
Even though she was meditating and being idle inside the underground chamber, in order to keep on the good side of Rex, she asked her children to surveil the surroundings, searching for any potential threats that were silently approaching Dargena City.
Thus far, their findings indicate nothing out of the ordinary.