resurrection spells require the soul to be willing to return, so a big question is whether the emperor identifies as Balduran because it has Balduran's soul or not. If it has the soul and the soul has come to enjoy the perks of being a mind flayer than it may be unwilling to return to a human body.
Does this mean that True Resurrection can only resurrect the Emperor as the Mind Flayer if he is killed, but not Balduran?
And the only way is to convince the Emperor, kill him, and resurrect him as a human
It's a pity that you can't talk to Jergal about this. Although he asks the question "Do mind flayers have souls?"
This means that the spells Wish and Miracle remain, which will not require the consent of the soul
