Sounds good. I chose clans because the canon is a bit vague on the Darcsen family system, but I'm thinking of them as similar to Scottish clans; large groups of loosely related families generally living in the same area. Harald is from a northern clan, initially from Europa's version of Denmark, hence his Scandinavian name. In any case it's mainly just fluff.
I'd welcome another soldier in 655, but they are one of the most tightly controlled units in the most repressive army in the world. So no moles basically. Loyal Imps only.