I do love his heart-on-sleeve attitude and the way he faces his problems. He has an incredible ability, but is so loyal to his closest friend and so conscious of Artemi's happiness that he does not use it to steal her away.
The poor man has been through quite a tricky time through the last two books, and it doesn't get any easier for him in the third. Actually, without wishing to blow my own trumpet too much, I think his story in the third is quite powerful. I kinda want to give my own character a hug to make it all better :-)