15 - Helmet
So, sorta calling back to where I switched things up with "Vessel" and this would have then been a call back... I had the idea of Nikki dressed up in Megaman-like armor/gear and... that worked pretty well for helmet too. I was thinking to do more of a close up thing with this one but... given I skipped drawing something along these lines the first time, it made more sense to pan out and show off a bit more of the presentation.

The design is modeled after X's Ultimate Armor (basically X4 through X6?), with the unique to DiVE color variant because... well, (A) I like it well enough and (B) blue is a nice color and probably fits on a black and white character better than MORE BLACK. And since Nikki's not a robut, I mocked it up in a way someone mentioned looked like Sentai... XD Though the idea had been more just "They're still in the process of suiting up." So I could give the helmet focus and not have to worry about cramming all of the larger, bulky armor parts into the image. Besides, if you check the DiVE art and animations in particular, this suit seems designed to come together in parts like that... like a... well... like a Sentai/Senshi Transformation? XD