Usually I start my INQ28 conversions with a torso or a head in mind. This chap started with the cloak. For ages I'd been wondering how on earth to use that pesky sniper's cloak that comes with the Cadian Command Squad. I cut the right hand off and thought that it would look wonderful with a protruding claw instead. Fortunately the cloak fit the odd ruststalker torso that I had laying around, not that you can see it, and various gribblies later I had an upper half.
The legs were another matter. My bits box is running desperately short of legs. In the end I made do with a floating style character. I think he works that way. Only the spare head from the Mechanicum HQ sprue completed the build.