Marshall D. Teach, commonly referred to as Blackbeard, is the captain of the Blackbeard Pirates and one of the Yonko who rule over the second half of the Grand Line, the New World. He was once a member of the Whitebeard Pirates' second division until he murdered Fourth Division commander, Thatch for the Yami Yami no Mi, and defected from the crew. He briefly held the position of Shichibukai after handing Ace over to the Marines before resigning upon returning from Impel Down with prisoners from Level Six.