Monkey D. DragonThis man is called Dragon in the animation film in Piece that I always show it in my TV. Monkey D. Dragon (commonly known as Dragon) first appears after a lighting bolt suddenly destroys the gallows where Luffy was to be executed by Buggy The Clown, and then saved Luffy from being captured by Captian Smoker. When he saved Luffy from Smoker a mighty gust of eerie green wind swept through Loguetown arc. It is undetermined whether or not he was the cause behind the gust of wind or the lighting, however the story leads to believe there is more to him than it seems. Many fans believe he did indeed cause the unusual wind and that he may also be a Devil Fruit user (a Wind or Weather Logia or satan Fruit is a common suggestion), but neither of these has been confirmed so far in the story. He was revealed to be Luffy's father by Vice Admiral Monkey D. Garp, and his true name is Monkey D. Dragon.
Than D. Dragon left Luffy to be raised by his grandfather, whom he apparently keeps contact with. Luffy himself doesn't remember Dragon. In Loguetown, he expressed satisfaction of his son becoming a pirate. Monkey D. Dragon is the seventh character to possess the initial of D. Due to his extremely rare appearances in the series, his personality remains almost completely a mystery, save for an apparent love for freedom and belief in fate, which are traits of a D. Unlike other members of his family, or Ds, he looks stern and serious hard.