The Neo Marines' Jolly Roger has a skull with slanted eye-sockets and a spiky crown, while the cross-bones are similar to an inverted Marine symbol and a cross or sword with a Yoru-like hilt, which symbolizes the organization's disdain for both pirates and the marines. The placement of the skull on top of the inverted "wings" gives the skull the appearance of an elongated tusks.
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The Neo Marines are a splinter group composed of former Marine officers that had trained and worked for Z, malcontent with the way their original counterparts have handled pirates. They seem to act upon the line of radical vigilantes, believing that pirates must be eliminated on sight, and that merely imprisoning them is ridiculous. Their loathing towards pirates apparent, they would go to the extremes to achieve their agenda, even if it means directly opposing the Marines and World Government, such as intercepting a prison ship to murder the arrested prisoners, stealing a powerful weapon from the Marines, and raising a jolly roger. The Neo Marines' ultimate ambition, the Grand Reboot, is to end the Great Age of Piracy, which they plan to achieve by using the Dyna Stone to destroy the three Endpoints to release enough subterranean magma to destroy the New World itself. Ironically, their actions and symbol are reminiscence of the pirates they despise so much, and despite their intentions of exterminating all pirates, they have been labeled criminals themselves.
Following the "army concept", all the infantry soldiers wears a standard uniform, consistent in a gray stahlhelm-like helmet and a dark gray sleeveless devise, with a belt where a sheath is hooked and the jolly roger imprinted behind. The trousers are light gray and tucked inside the dark boots. They have a jolly roger that borrows many design elements from the Marine flag, reflecting their origins and purpose. The rank-and-file troops also make use of a variety of weapons such as firearms.
Their leader, Z, who as a former admiral was considered to be ranked among the World Government's greatest military powers during Roger's era. Not much is known of their overall strength other than that they based their clandestine operations in the New World. However, Shuzo's forces proved to be capable of taking on four Marine warships and a Vice Admiral with the former being a former Marine Commodore. They have even armed themselves with Dyna Stones stolen from the Marines, weapons of mass destruction that rivals the Ancient Weapons in terms of sheer power. Furthermore, with a fleet of several hundred warships, three Devil Fruit users, and a Pacifista army at their disposal, they were considered a force going toe to toe with the Straw Hat Pirates.
The Neo Marines possess a large fleet of ships, most of which seemed to be built among the lines of ironclad warships, with steel plates as hulls, but the bow made of wood, and large enough to have multiple sails. The admiral's flagship, the White Tiger, is larger and with more elaborate design.
Shuzo has a submarine composed of steel, with only parts of it having wooden sides, and the insignia imprinted at the front, as well as command of an entire fleet of torpedo-like submersibles to carry his platoons.
Z's Ambition Arc
The Neo Marines were in the New World waiting for further orders from former admiral Z; at the time, Ain and Binz were on one of the ships and they were waiting for Shuzo but Shuzo wanted to kill Lily's father who steals food from the World Government and the Marines. Since their policy was to kill all pirates in the New World, Shuzo wanted to kill Lily's father before he got sent to Impel Down. Ain told him if he failed, then he would suffer the consequences.
After a brutal battle against the Straw Hat Pirates, Shuzo and Alpacacino were defeated and detained. They were then arrested by Momonga and sent to Impel Down. Z dismissed this, as he was assured of his subordinates' loyalty of not revealing any information. In the same moment, they arrived at Firs Island.
One Piece Film: Z
In order to steal the Dyna Stones, the Neo Marines attacked Firs Island's Marine Base. During a fight with Borsalino, Z detonated a Dyna Stone to destroy the island but the explosion separated him from his army. After the destruction of Firs Island, the Neo Marines used a Vivre Card to locate Z. They eventually located him on the Straw Hat Pirates' ship, and fought the crew. The Neo Marines easily defeated their enemies, and were about to completely destroy their ship, killing all the members of the crew in the process, but the Straw Hats managed to escape in time.
They then headed to Secon Island, where they fought and defeated the Marines, and planted a few Dyna Stones to destroy the island. In the meantime, Z gave his men a speech about his plan to wipe out all pirates, but was interrupted by Monkey D. Luffy, who demanded they return the members of his crew Ain had rejuvenated to normal. Z, Ain, and Binz briefly fought Luffy, Zoro and Sanji, but interrupted their battles soon afterwards to evacuate the island.
The Neo Marines later went to Piriodo, where Z met his former student Kuzan. After a short talk, he set up the Dyna Stones, and waited. The Straw Hats arrived shortly afterwards, and after a long, grueling battle, emerged victorious. Z then sacrificed himself to allow the Straw Hats and his men to escape an ambush by Borsalino. Ain and Binz were last seen in front of Z's makeshift grave, mourning their leader's death.
- One Piece Movie — One Piece Film: Z, The Neo Marines serve as the main antagonist over the course of the film.
- One Piece Movie — One Piece Film: Z, The Neo Marines' symbol is shown when Garp explains Z's past.
- One Piece Anime — Episode 575, Shuzo wanted to kill the captured Panz Fry simply for being a pirate.
- One Piece Manga and Anime — Vol. 32 Chapter 303 (p. 19) and Episode 225.
- One Piece Anime — Episode 575, The White Tiger and Shuzo's submarine make their debuting appearances.
- One Piece Anime — Episode 576, Shuzo attempts to kill Panz Fry by attacking Momonga's ship.
- One Piece Anime — Episode 577, A three way battle between Shuzo, Momomga and Straw Hat.
- One Piece Anime — Episode 578.