Who is Kissoon from The Great and Secret Show: The First Book of the Art and what is their importance?

Kissoon is a former member of the order of the Shoal. He murdered all the other members except for one, and then he joined forces with the Uroburos as they sought to enter the cosm. Kissoon is killed in the final battle by Jaffe, with the same knife that was used to kill Homer. He is described as ill-mannered, and he can create creatures called lix through extremely foul practices.