That looks like a costume modelled on Rumia, a youkai of darkness.
It creates a field of darkness around you, which you become a part of, but...
In that darkness, you also lose your vision.
And from the outside, you look like a black sphere, so you actually stand out more.
To be honest, I can't recommend that suit.
...Is that so?
Naked Snake: I was rather fond of it...
Para-Medic (on Pixiv): It's okay, it's cute!
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