D.R.

D.R. is the main antagonist in Oda's one-shot, Monsters. It is mentioned that he is the third rate swordsman in the world (in that age). He bumps into Ryuuma and he stabs himself, claiming that Ryuuma did it. After this event he summons a dragon to destroy the village, claiming that Ryuuma challenged him to do it by stabbing him, but his original plan was to steal the villagers' precious items when they ran for their lives. Instead, he was stabbed by Ryuuma this time and he failed his goal.

Trivia

 * D.R.'s wanted poster that can be seen in episode 45 of the anime on the wall on Fullbody's ship. Another poster can be seen in episode 48 when Luffy goes to the Gold Roger Bar.