Pazuzu was the younger brother of Zhimala and the older brother of Khufu. He tried to keep out of the fighting, but if action was necessary then he was top notch. He spent most of his life "in the middle", not really a traitor but still not so loyal to the clan that he'd sell out traitors.
Rather than making it a moral desiscion he waited until it seemed clear what side would win (between demons and demonhunters). Not really supporting either side, he finally sold his clan to the demonhunters and died as a traitor.