Here's who it is. Scopper Gaban showed some very impressive feats to the fans in One Piece chapter 1140. After all, fans always wanted Gaban to give them a glimpse of what he was capable of.

Scopper Gaban told Luffy that he would have to fight him if he wanted Loki’s key. Scopper Gaban's nickname of "Mr. Ya" is likely derived from the Japanese spelling of his name, which would be ...