5th May 2014: My very own angel! Putting this as 'in progress' as I am activly mentally planning what I am doing for this.
I have been looking at stores and seeing where would be the cheapest place to buy the PVC and been looking at pattens. I think I can use a Bunny suit pattern as a base and as a result found a cheap, and hopefully reliable, method to how to pattern Hikaru's bodice, involving Saran wrap and tape. My boyfriend's aunt had a fabric clear out recently which happens to be mostly what I need for the undersuit so hopefully that is a few quid saved XD