This Krystal cosplay by GatrayProject (がっとれー) went under my radar due to occurring in Japan sometime in 2014. There are quite a few photos of this body-suit style cosplay. I've linked to them below. There are possibly more. Thanks to Ayano to bringing these to my attention.

• Full body photo
• Staff pose
• Back view
• Head and hair closeup
• Armor and bikini-top closeup
• Armor pieces
• All props