the basic idea for this was from 2007, when I went to Anime Expo in South California. I didn't sign up ahead of time that year, and the line for registration was uber bad, so I was in line for like 5 hours. and I sketched a few of these elemental girls then.
It was a lot later that My boss asked for this type of thing himself. I proposed the old sketches to him, and he approved them.
Originally they were full grown matured bodies, but these are much smaller because they will be pixy size instead of the original concept.