Sakazuki

Admiral Akainu (赤イヌ大将, Akainu Taishō formerly known as Vice Admiral Sakazuki) is an Admiral in the world of One Piece, one of only three to hold such a position and subordinate only to Fleet Admiral Sengoku.

Appearance
Like any other high ranking marine he is dressed in a simple white/grey suit with a white marine coat drapped to his shoulders.

He also wears a simple white marine cap, and unlike most other marines, he wears a dark grey hood, over his cap, that seems to be a part of a cloak he wears beneath his suit, or marine coat.

His entire face is not seen during his appearance, as it is hidden by his cap.

Personality
He believes in "Absolute Justice", going as a far as destroying the refugee ship if even one of the schoolars had escaped with it, which is against Aokiji's way of thinking.

''If you are going to do a job, do it thoroughly. If even a single scholar managed to sneak on board, all the sacrifices made today would have been wasted. Evil must be completely eradicated." Akainu's view on destroying the ship.

Ohara Incident
He was known as Vice Admiral Sakazuki before his promotion. He was present at the Ohara incident, being one of the five vice-admirals, leading the Buster Call offensive. He ordered the destruction of an evacuation ship of civilians and soldiers, claiming it needed to be destroyed in case a single scholar managed to sneak on board (an action that horrified even Spandine).