This is a better version by seisakudiary with two outfit : bikini and her usual trench coat outfit.
For some reason I’d say she looked so much like Hatsune Miku.
Could it be this is just another version of black miku in disguise as another character ?
From featured picture above you can see that Trench coat B.R and Bikini B.R uses different weapon.
The trench coat version is using ?Rock Cannon which she obtained after the fight between her and Black?Gold. The weapon is said to replace her Black Blade.
Thanks to seisakudiary for making this wonderful paper craft .