Marshall D. Teach, most commonly referred to by his epithet Blackbeard, is the captain-turned-admiral of the Blackbeard Pirates,[8] and one of the Four Emperors. He is also the only known person in history to wield the powers of two Devil Fruits. He started out his pirate career as an apprentice of the Whitebeard Pirates, then later became a member of the crew’s 2nd division. However, he defected after murdering Thatch, the 4th division commander, in order to steal the Yami Yami no Mi.Prior to the two-year timeskip, he briefly held a position among the Seven Warlords of the Sea after defeating and handing Ace over to the Marines, before resigning upon returning from Impel Down with multiple Level Six prisoners to strengthen his crew. His actions resulted in him being considered a part of the Worst Generation along with the Eleven Supernovas.