Shamadhi Sam:
Psi, thanks, I'm glad there are some other opinions to consider! I did a little research online, and as someone very new to Tibetan Buddhism, am definitely at a loss as to what the differences between Vajrakilaya and Mahakala might be. So far, I've noticed that in some of the thangkas Vajrakilaya seems to have three heads, where as Mahakala only has one. Otherwise, in terms of the iconography, they're just about indistinguishable to my eyes. I am sure they have at least slightly different purposes and functions, of which I am also quite unaware of at this point.
Oh, Maybe it is Mahakala, but it looks as though Mahakala is usually black. I just have a hunch it is
Vajrakilaya , the destroyer of obstacles, anger, greed , and delusion.
By the way, the picture looks like the face of a demon I saw hypnogogically as a child. I was about three to four years old, I saw a face hovering around and floating above the bed, the disembodied head then went under the blankets and I could feel the lump next to me. I screamed and yelled in terror until my parents came into the room, I told them there was a head under the blanket, they lifted the blanket, and it was a pillow.
But, the head from the childhood visualization looks like the image on the side of Robina's chair. Weirdness...
But, I really do not know much about Tibetan Buddhism, honestly, I was just casting a vote, based on a hunch , the words wrathful demon came to mind, as a verbalisation, when I saw the image on the youtube link you provided, I googled that , and one of the images seemed to match Vajrakliaya.
Sychronicity
Psi