His name is Brian Carroll, hes adoptred various personas in his career, most famously Buckethead, but previously he was a robot called Death Cube X. Nobody has ever seen his face, apart from some people at a Guns N Roses board, not even his mother - he was born wearing a ski mask(which obviously is removable), but the KFC bucket began to grow with the onslaught of puberty, and cannot be removed. He has huge hands. He's played with Primus in the past, as well as Guns N' Roses who he has reportedly just left, and most recently Claypools Bucket of Bernie Brains, consisting of Les Claypool on bass, BH on geetar, Bernie Worrell on keys and Brain on Drums. His most famous album is Colma, well worth checking out, although it gets boring in my opinion.