He is and never was human. Thus his shape is always faltering, changing or dispersing. He is the collective conscious of a deceased man's love. It was so potent that it lived on after he passed. Inside his chest resembles the cogs of a clock~ he hunts for the love that- once found- will hold him together. No longer does he want to be a shifting mess of thought and emotions.
However, if he never finds her when the clock winds down, Grit will disperse forever, as did the body he manifested from centuries ago.