The captain of the Blackbeard Pirates, also known as "Blackbeard." He was once a member of Whitebeard's Pirates, belonging to the second division led by Ace. He broke into Impel Down and added some terrible criminals to his crew, and then also obtained Whitebeard's powers for himself, rapidly expanding his forces and allowing him to become one of the Four Emperors of the New World.
Teech uses the power of both the Dark-Dark Fruit and the Tremor-Tremor Fruit. A recommended technique is to use the power of the Dark-Dark Fruit to surround his enemies with darkness, then use the power of the Tremor-Tremor Fruit to defeat them.