User blog comment:AegisIsKing/Help?/@comment-24507267-20150203231658/@comment-24507267-20150204125004

Tamer: like a monster tamer, animal tamer. They can meet wild animals, make them friendly and comrades on your Journey.

Thief: self explanatory. They steal what they can't afford... Which is everything. But they could also be helpful. (I hope)