Responses
This is such a great theory, I have to agree, also the brother not having a face? It might be, might be possible that he is introduced to us without knowing it's the brother since we never know what he looked like and also what if they're involved? I mean I shouldn't dig deeper because his role is "the brother" right? But what if?

I have a theory that Dante is immune to the fog but not immune in a way we think he is. I believe that he has no talent in him which makes him immune to the fog since the fog only increases the talents we already have. Dante has already been exposed to the fog many times but still there is no change in him so immunity but it's just a theory I suddenly thought of. Not real