Oh! Er - his face was horribly scarred a few years ago. He's very sensitive about it. Think, like - a giant brand across his face. Very deep. Instead of dealing with it or risking surgery to minimise it, he had a mask clamped to his face instead.

A. Mask of his old face. A really advanced one - it moved with him and even restored the appearance of his burnt-out eye. If the AI uses video again, take a close look - he has the mask, it's just harder to notice with him being a freaking hologram.