Diana Castellano

Diana "Rifle" Castellano is the second in command of The G.U.N. Mafia.

She is a swordsman who escaped from The West Blue and entered The Grand Line against her will. When she was twenty a group of wealthy nobles illegally entered Wano and forced her to return home with them. She was forced to fight into underground brawls as entertainment for the world nobles.

Eventually her two sword style got boring for the nobles and they ripped away her blades, her treasure.

Having nothing left she lost her next fight and was flung out with the trash. However a wealthy man went to find her after seeing her fight. That man was Don Gattling of The G.U.N. Mafia, who offered food, housing, and any blade she wanted.

Defeated, she accepted his offer but she refused to use swords again. She felt shame in using any blade aside from her original two, and since then has strictly used sniper rifles.

She however does not use them correwctly and holds them by the long barrels, as if they were swords. All of her previous sword techniques still carry over with this strange new style.

She's named this style "Ni-Ju" (Two-Guns).