User blog comment:Monkey.D.Me/SOUL FAQ (*^*)/@comment-4783583-20120227023410/@comment-4783583-20120228051953

wait the search bar didn't find him, that is odd, however if you looked at the canon character list you would have found him in a jiffy. To answer your question Yukichi Skull is one of the three historic peope with great importance to the world government who have been chosen/selected to appear upon the beli banknotes. Go to the article about beli or the canon character list.

PS: Since he is a once upon a time living skeleton too, my guess is, that he is the former eater of the yomi yomi no mi.