If he is a ghost, then it's very disappointing for me, because he is banished in the story, and that could mean that he won't be coming back, and that would be terrible, wouldn't it? ↗
A universe that came from nothing in the big bang will disappear into nothing at the big crunch. Its glorious few zillion years of existence not even a memory. ↗
Usually a feeling of disappointment follows the book, because what I hoped to write is not what I actually accomplished. However, it becomes a motivation to write the next book. ↗