Blackbeard / Marshall D. Teach

Marshall D. Teach, known as "Blackbeard," is the Admiral of the Blackbeard Pirates and one of the Four Emperors (Yonko). He is the only known person in history to wield two Devil Fruit powers simultaneously — the Yami Yami no Mi and the Gura Gura no Mi, stolen from Whitebeard's corpse at Marineford. Formerly a member of the Whitebeard Pirates' 2nd Division, Teach murdered his crewmate Thatch to obtain the Yami Yami no Mi, then captured Ace to trade him to the Marines for a Warlord title. Cunning, patient, and ruthless, Blackbeard rapidly rose from obscurity to Yonko status.