Jackie

Gentlemanly Jackie is a resident of Steel City on Jail Island.

Appearance
Jackie is a well-dressed man of average size with short blue hair and a small goatee on his chin. He wears a yellow suit jacket over a green vest and red kerchief, and his pants and large top hat are also yellow. He also wears a pair of brown boots.

Personality
Not much is known about Jackie's personality, but given his epithet he can be assumed to be quite polite. He answered Luffy's questions regarding the Straw Hat Pirates and Isaac without any issue.

One Piece: World Seeker
Jackie talked with Emma one day outside about the prison warden Isaac leaving the naval base, and they wondered if it was due to something with the Straw Hat Pirates. Monkey D. Luffy, who unbeknownst to them was the Straw Hats' captain, then approached them and asked about the situation. He then asked where he could find the warden, and Jackie and Emma told him.