I think he is Bolian - no antennae! (but he should loose that hair.)
Seriously, drinking Silver cannot be good for you. If it is building up in your body to an extent that you have a skin colour change, then, at the very least, it must be damaging your Liver. I would expect the same would be true for the sulfhaemoglobinaemia - surely if your blood is green then there has got to be some side-effects?