I play a lot of Norns, and I'm heavy into their culture. I too have a Norn Thief, who considers himself a follower of Otter. You can be a thief and a Norn, and its quite easy to set that record straight. Like your idea he is a shady and lovable guy, but he's also a pirate raider. Norns can have 'gentle giant' traits, but that doesn't really speak for the norm. Remember that above all, hunting is a high virtue for the Norn, as is testing one's self against the savagery of nature. Norn can be very violent in those moments, showing teeth and claws if the beast within them begins to manifest. The more 'in line with current civilization' Norns are known to be good natured, but there are enough Sons of Svanir to show they can also be callous, cold, and unforgiving. In short, there's nothing about a Norn that isn't manifest in other races as well. Embracing of technology and the asura have a saying that 'the size of a brain is also relative the size of the intellect' which puts Norn ahead of their own curves. This is also reflected by some Norn being ready to pick up the engineering arts as well. So honestly? Your ideas are already good. I've been in plenty of Norn culturally focused guilds, and these things are not so much outside the box as they may seem. Thief is a catch all term, much like warrior is. It covers a very broad base of things.