Undine is REALLY pretty, and i love all her blueness. i'm a not a huge fan of Asian themes though, so i'm on the fence about getting her. but - OMG
so much blue....

eh, i probably will in the end.
i agree with Tammy about how about the art 'improving' through the evolutions- not only does she go from simple to elaborate clothing but from simple to elaborate drawing (her eyes are especially beautiful, i love how you shaded them.) that's really cool and an interesting concept that i haven't seen before. glad you put the spoiler up, she needs that or at least a preview so she doesn't get overlooked.
is her clothing based on any particular nationality?
when a friend of mine was dating a part-Asian girl, she always wrote it "Azn" X-D i keep wanting to write it that way but i don't want to inadvertently offend anyone. :-(