Jormungand's main heroine, gun dealer, and leader extraordinaire Koko Hekmatyar has been one of the most easy-to-cosplay characters in the anime industry. But because of the anime not-being-so popular compared to the recent releases of anime this year you'll rarely see cosplay of her in the web. Good thing Lily Liu made not just a decent cosplay of hers but she made it look so awesome that it reeks sexiness to her portfolio.
Lily Liu, if you're curious ,is a Chinese decent but currently studies in the UK. She has a nice portfolio of characters and I think it's one of the best out there if you have the time you can check her DA account and see her other works.
In due time if she continues doing cosplay, I'm sure she'll be a well known individual in the cosplay community.