It depends on the mood you want to set and the situation going on the the pic. Here it's just a figure, without much to embellish it so it's a bit hard to say...
If you want to keep the white/sterilization thing, you could draw in a hospitable operating room- or maybe go another way with it and throw in a grave sight, or some sort of sacrificial backdrop. Or prehapse an elaborate window of some sort.
Make up a little back-story for yourself and see what fits best- I can't really say what it should be for you without knowing more about the pic/what it is you're trying to convey.