Does Jonathan have other friends?

Does Jonathan have other friends that speak to his ideals, or is he the only one?

I know a few.  There’s Donald Shimoda, the ex-Messiah of Illusions.  There’s the ferrets of Curious Lives, even more directly connected to the events of our lives. 

Uh-oh.  I think all my books have a quiet connection, as though my life was built to support Jonathan Seagull. Not a burden, that connection, but a joy.