Marshall D. Teach (more commonly known as Blackbeard) is the Captain of the Blackbeard Pirates. He is a former member of the Whitebeard Pirates and is one of the main antagonists in the One Piece series.
Blackbeard like Monkey D. Luffy is searching for the One Piece treasure to become the new Pirate King.
Blackbeard is one of the strongest pirates in the world and for a brief amount of time was one of the Seven Warlords of the Sea. He is also the only known character to possess two Devil Fruit powers.
Blackbeard is brave but also a coward as well as being very intelligent but also stupid. He enjoys taunting his opponents and is a very overconfident fighter. He is now one of the Four Emperors of the sea.
For the English dub version of the One Piece anime by Funimation he is voiced by Cole Brown. In the dub of One Piece: Pirates Carnival he was voiced by an unknown actor. In One Piece: Stampede he was voiced by Chris Rager.