Here's Sparkle's History in all its glory. Referring to Michiru's History, Sparkle didn't see any development until Michiru became her own character. So in other words, Sparkle was sort of "piggybacking" onto Michiru until she was ready to be "born." I guess I could even make a comic about this (maybe even a self bio of myself using my characters..!) I could do that or I could just make a collage of all the different Sparkles here~.
Interesting fact is, Sparkle's fur colors went like this:
A lot has changed about Sparkle, even her personality has mellowed out a bit at the end while still keeping her original personality. Just as Sparkle's appearance changed so much, so has the stories around her. ^w^