Roy's guess was right. As soon as he took the Red Sea Egg away, the Charred Council immediately noticed!
After all, this space was under the control of the Charred Council. Although Envy's betrayal and invasion caught them off guard, it did not cause the council much trouble. In fact, during the time Roy was healing in the Red Sea Egg, Fury had already dealt with Envy.
However, Envy had seen traces of Raphael being infected by Void power, so she revealed this news to Fury when she died!
Of course, Envy did not have good intentions, but this news became the last straw that broke the camel's back for Fury. During this period of time, Fury had been investigating what Roy had said about the corruption of Void power. She knew how terrifying this power was, so when she killed Envy, she immediately began to question the councilors about what was going on.