Yeah it would definitely be interesting to see a photo of it.

I asked my friend, he said that it could be anyone and if this truly was a very powerful entity doing this to make you realize that you have a responsibility even in dreams, then he wouldn't show his real appearance since you might be surprised of who it was and then you wouldn't believe that what you were experiencing was real. So the appearance isn't important, what's important now is that you shouldn't be scared or afraid he simply works like an astral or dream police. They are tough, they punish people that kill or harm, but they wont hurt you.
Just think about what you do there in the future. This sounds silly I know, but this is the kind of explanation there is if you perceive this as real.