Lord Manxaze is one of the four Rahjs the players affiliated with.
His role with the four Rahjis doesn't seem to be as clear cut as the others. Lady Hazemura seems to be the diplomat and a capable caster, the other two are Lord Kintemazu, the Researcher and Lord Kinekoro, the Warrior.
He doesn't care at all about currency in the fadelands, even Anku doesn't seem to be really important to him, his most important goal seem to be to acquire more Karma to add into the great pool.
He seems to be a better caster than Lord Kinekoro (as shown when they cast their burst divinations when the spirit shackle falls, his divination pattern is greater than his) but smaller than Lord Kintemazus or Lady Hazemura's.