Self-Defense Forces

The Reploid Self-Defense Forces (自衛団 Jiei-dan) are a group of battle Reploids who make an appearance in the Rockman X4 manga. They work to defend certain cities around the globe from Maverick attacks but are distinct from the Maverick Hunters.

In the Ocean chapter of the Rockman X4 manga, Repliforce commander Jet Stingray destroys the seaside city of Toraisu as part of his plans to further the coup d'etat that his organization has started in rebellion against the humans and Maverick Hunters. After the destruction of the city, the Hunter Zero appears on a Ride Chaser and attacks Stingray's naval ship in the ocean. Stingray has his Repliforce subordinates fall back, saying that he will face Zero alone, who he instantly recognizes due to his red armor and long blonde hair. Stingray is infuriated over the fact that Zero has chosen to oppose Colonel and the Repliforce, seeing it as a betrayal and insult to the Colonel.

Zero and Stingray battle it out for a while and are about to collide again when Stingray's Repliforce soldiers arrive on the scene with Ride Chasers. Stingray is shocked that they have disobeyed his orders, but they explain that their honor compelled them to aid their commander and not leave him to fight Zero by himself. Suddenly, the Reploid Self-Defense Forces arrive on the scenes, and unleash a fury of arm cannon blasts on everyone present. Stingray's Repliforce subordinates are all destroyed, and Stingray anguishes over their deaths before succumbing to his own wounds from the blasts and perishing as well. The Self-Defense Forces also blast Zero, as he had previously attacked fellow Maverick Hunters and declared his support for the Repliforce coup as part of his plan to go undercover and take down Repliforce but did not inform anyone of his plan. Thus, they were unaware that Zero was actually on their side. Zero is revealed to have survived their attack, being rescued by Iris.

Characteristics
These Reploids are all equipped with helmets and visors, and mouth coverings with a triangle pattern design. They have powerful arm cannons at their disposal, which come with an aiming scope they can deploy from their wrists. Their cannons have a fast firing rate, very efficient for taking down multiple enemies. The organization is made up of squads who are responsible for assigned areas and enemies. They are very proficient at stealth and performing sneak attacks, as they were able to ambush Zero, Jet Stingray and a group of Repliforce soldiers at sea without any of them realizing they were coming.

They function separately from the Repliforce and the Maverick Hunters, and ultimately work to ensure the safety of humanity. When the Repliforce declared their indepence from the human government and launched a war against humanity, the Reploid Self-Defense Forces swiftly came to humanity's aid and vanquished a group of Repliforce soldiers responsible for the destruction of a city.