I'm considering making a Noble based around emotions. The basis for it is this emotional spectrum that I found somewhere (I don't know where it originally comes from though):
[img=http://i.imgur.com/m3icKIU.png]
Basically, the Noble has MPD. He switches emotions (and personalities) at random, and in each personality, he has a different power. He's slightly mad, since he has 7 conflicting personalities at all times.