Waffe is absolutely brilliant, but he can't handle social situations at all (has the uncouth neg trait), and just doesn't understand this whole social contract thing. Having worked for years designing weapons for Ares it became an obsession for him, and he had to perfect their use as well. Someone noticed how good he was, and word got around to Firewatch. Someone had the smart idea of recruiting him so he could see his inventions actually used in the field. This suited both him and Ares well as he was able to iterate on things even faster now. He's not so much by-the-book or anti-establishment, he's more "what makes the most sense" type. As such, he could be convinced to leave Ares, but he probably wouldn't have any particular cause to. This Link would absolutely fascinate him, especially if he was able to start using it to build new things. Having another voice in his head could be absolutely maddening to him though. I could see using the link to try and cure him of his aspergers, giving him access to someone else's thoughts would either enlighten him and allow him to make the mental leap from simply racing with his own thougths to making time for others. Or, he could drive the other side batty with his million mile an hour thought process.
I can see him meshing with pretty much all of the proposed characters in various interesting ways.
Ericen: Archtype - we'd be heavy combat; Personality - two non-filtered fighters, don't see a lot of "healing" going on here, but they'd work well together as Ericen's character's harshness really wouldn't bother Waffe
Scawire: Archtype - I think this would work the best; astral/matrix overwatch with physical combat well covered; Personality - Could see Scawire's character being a balance for Waffe, and helping him make that "emotional" leap.
Poindexter: Archtype - ??; Personality - this would get dark fast, it's unlikely Waffe would see any particular benefit in any kind of personality shift here.
Novocrane: Archtype - again, combat heavy, but complimentary; Personality - This would be the harshest, I don't think Waffe would put up with a liar for long, especially when he *knew* they were lying.
Ravensoracle: Archtype - Uber combat heavy, seems actually redundant; Personality - I think this would be rather interesting, it seems that "The Detective" has the work ethic that Waffe would respect, but the darkness would be an interesting layer on top of the social issues
Koshnek: Archtype - Another reasonably good combat match; Personality - This would be another balancer for Waffe, the laid-back vs. high-strung and anti-establishment vs. blase
As for staying or leaving Ares, Waffe would probably lean towards staying. Things are good for him, but could be manipulated or convinced without too much dificulty to leave.