Prince Mandor Sawall sjael er havet Xau is an associate of Delwin’s. He is the only entitled who is allowed free access to the Legion archives. (His enemies say this is because he is sleeping with the Emperor; his friends point out that in fact, he is sleeping with the Archivist. In fact, he may actually be sleeping with both, or neither.)

He is an accomplished sorcerer, specialising in culinary magics. He is also a terrible flirt.

His mother Gramble Sawall is, although not the Princeps, by far the most powerful member of the Xau family.