Aokujira

Aokujira (青鯨), whose real name has not been revealed, is one of the Marines' Three Admirals, along with Hakushishi and Midoritaka. He has eaten the Tsuchi Tsuchi no Mi, a Logia-class Devil Fruit that has granted him the powers of a Earth Man (土間).

As an important figure within the World Government, he is in charge of locating and securing the Ancient Weapons or their blueprints, as well as dealing with those aware of them.

Due to his actions, he is a major character in Proud Line.

Trivia

 * His appearance is based on the character of Jotaro Kujo from JoJo's Bizarre Adventure Part 4: Diamond is Unbreakable.