Yes, Oz,
I have seen black auroras around people but only on a few occasions. When I lived in Mexico, we turned the corner in the car and standing at the front of a house/office where two military types dressed in all black with black mask hiding their faces, they where young men in their mid twenties from what I could tell, They were standing guard with their machine guns in front of this house. I know that is weird your asking how I could say that being that their whole bodies were covered, I don't know but I could easily tell.
They both had large black auroras around their upper bodies and heads, my wife was with me and we both saw them, and I asked her if she saw the black auroras and she said no, she did not see anything like that. A few days later they said on the news they had killed the whole family in that house. This was a few blocks from our house. Lots of horror stories from there, I will not go into.
I also saw a woman walking down the boulevard, with a very tall man she was dressed in white, and this woman had a huge white aurora around her, practically covering her whole body, I wanted to go run over there to talk to her, because I had never seen anything like it before, but my employee walked up and was having some issues with my business that needed immediate attention, so I could not go talk to her, but still regret it. I have tried to see auroras on people in the past but never have been able to except on few occasions when I did not expect it. I looked all around for that woman just a few minutes later and she just disappeared, don't know where she went.