Ronse

Vice-Admiral Ronse (ロンズ中将, Ronzu Chūjō) is a Marine Vice Admiral who is also part of the Giant Squad. Ronse is a giant who wears a helmet and has dark hair. As a Vice Admiral, Ronse has command over lower-ranking subordinates of the Marines. Battlewise, Ronse is a Giant, which grants him strength and endurance that is several times greater than that of an average human. Ronse uses a giant battle-axe to fight.

(Source: One Piece Wikia)