Phillip IV
The son of Cassander. A known Lich. The Danger Gang recently met him. With a little smooth talking, he did not kill them outright, but has instead sent them on a quest to find a Bloodstone. When they returned without the stone, he seemed disappointed. Eorl then picked a fight and the Danger Gang beat him up. He then turned into a pool of water and flew down the drain in the middle of the room.
He has clearly been driven mad by years of isolation, and perhaps from reading the Al Aziz. He now hides in a room in Cassandrea, writing the letter mu over and over on top of all his books.
He has a pet cat that is possibly invisible, or maybe is a displacer beast, or maybe it doesn't really exist. He also had a pretty kick ass looking staff covered in rubies. Now in the possession of Can. It is some sort of Staff Of Spell Storage, and if it works it will probably kick ass.
He seems aware of the impending fate of the world and has decided that his best hope is to hide out where he is, wait for the whole thing to blow over. I gotta say, it sounds like an alright plan.