"I believe that we may be able to do the same thing with Dravin and Tobias. It won't be easy, though. In order for such a process to be successful, we will need to know the entirety of at least one of their True Names. That, in and of itself, will probably be quite difficult given both their present states.
She shifted in her seat, leaning forward a bit as she got the crux of the matter. "The more unique properties--and, in the case of living and sentient creatures, experiences--that a thing or person has, the more complex their True Name becomes. For thinking, self-aware creatures such as ourselves, a True Name changes frequently. After all, none of us is exactly the same person that we were the day we were born or even a year ago. Our experiences, what we learn about ourselves and the world around us, changes us. Sometimes, fundamentally.
"For instance, Tobias has managed to save a portion of himself by separating it from his body. Unfortunately, any True Name that we could get from him at present would also be incomplete as a result. In order to separate him completely from Dravin, we will need to gather all the pieces of his full Name that he left behind in his escape. Otherwise, we could wind-up with all of Tobias except his feet or a Tobias with no memories after the age of three. But, if we can get his Name, I truly believe that we can retrieve him. And, once robbed of his vessel, Dravin may be weakened enough for us to put an end to him once and for all."