Cassandra - Working Version

I'm trying to hone in my skills as a character designer... and this is one of the first female evil protagonists. Her name is Cassandra, Queen of the Underworld. I've wanted her to look like a very elegant, porcelain skinned, ageless beauty with an intense gaze. I need to do a lot more refinements and the idea is to have her ly on a bed of roses... but I'm not quite sure yet how I can blend the background in realistically.