Cosplayer extraordinaire Kuridel Black of Uruguay is planning a Krystal cosplay. The armor is some of the most accurate I've ever seen, made from worbla. She posted several sketches and finished armor pieces previously, and then had to put her Krystal cosplay project on the back burner.
I've been chatting with her and she plans to restart work on this cosplay project in the near future. When complete, she will be a humanized Krystal, though she plans to cosplay as several different Krystal versions. I expect that means at least the Adventures and Assault outfits, and possibly more. She will be sending in a lot of extras and photos when she gets the costume done. For now, you can follow her progress on her various social media accounts.