Ghostwriter

Belfry, Dime. Those two are, if not ready, very close. They may be extracted.
Yaffenhash will be delayed, but just a bit. She could use a bit more to her character, but I suspect given a bit more time that will resolve itself without needing additional outside influence.
Puffy, hm. I feel Puffy should stay here a while longer. They haven't had quite as much time to develop as a character compared to the other three, and having a semi-familiar character to return to would ease the introduction to book two.

As a note, don't worry too much about 'extraction' in the literal sense. For the purpose of the ongoing story, they will continue to exist. Sometimes for a nickel, they are transferred wholesale, but as this is a bit interim, they'll be treated as being copied.

Unless we'd particularly like to remove them from the setting, that is. I am open to many things.