In simple terms, Convert changes the loyalty of the other being to a different one.

As I understand it, it is currently forcibly loyal to the Empress. I am going to attempt to give it a different loyalty, one that allows it the freedom to chose the course of it's own actions.

If it wishes to die or return to whatever depths it once called home, there will hopefully be no compulsions to prevent it from doing so. Whatever it does, it will do so on it's own terms if I am successful.