Onigumo

Vice-Admiral Onigumo (オニグモ, Onigumo Chūjō) was one of the five vice-admirals leading the Buster Call on Enies Lobby. He was the one who commanded three ships to attack a fellow Buster Call ship with all its 1000 fellow sailors on board just to target Luffy,who was fighting on it with Rob Lucci.When a soldier argued against this order, Onigumo shot him in cold blood, saying:

"With a moment of hesitation,can you protect the future, from a criminal who is trying to escape? Fire!".

He was last seen shouting insults at the personel of the Gate of Justice for closing it down (though in reality it was closed up by Sanji).