Zero

Personality: Given that he's been in stasis and lost his memory, Zero is ignorant of some matters and confused about others, sometimes to the point he starts doubting or believing that he can't win. This is seen a couple of times. First when Ciel was captured by a Golem and Zero was battling with the Buster Shot, which was not doing too much damage. He was slowly starting to lose hope until X gave him his Z-Saber back. Another example was when Dr. Weil told him he was a copy, causing him to believe he was not the real Zero. He only gained his confidence back when X claimed he was indeed Zero in spirit, swapping roles so that X is the one that encourages Zero to fight instead of the other way around as it used to be during the X series. Probably due to his amnesia, Zero became a much quieter and distant character, especially in the first game. He rarely prolongs a conversation and provides only quick answers. He keeps his expression serious throughout the series, rarely showing any other kind of emotion, now no longer smiling at all.

His moral code also seems to have changed between the series. Although he was a heroic and proud Maverick Hunter in the X series, he became a soldier who will do whatever it takes to accomplish his missions in the Zero series. This includes questionable methods, from sacrificing the lives of Cyber-elves to gaining more advantages in missions, killing brainwashed soldiers and killing the Baby Elves without seeking an alternative solution. Although the first two are completely optional, the third isn't, though he did it in self-defense. He claims that he no longer cares about being considered a "hero", and that he just fights to protect what he cares about. He goes far enough to not restrain himself from the possibility of killing a human, a taboo that any other protagonist of the franchise wouldn't have the courage to break (though that being said, the circumstances involved left him with no other choice as Ragnarok would have destroyed Area Zero otherwise). This act properly classifies him as an anti-hero, with Zero himself admitting in the fourth game that he has never seen himself as a hero, although it's unknown if this was his thinking in the X series or if it's the consequences of his amnesia and new experience in the Zero series.

There was one thing that Zero seems to have maintained; his respect and admiration for his old partner, X. After defeating Copy X in the first game, he noted that despite his memory loss, he remembered the original X as being a true hero (and in the Ciel's Memory radio drama, even explained how X originally was a coward and prone to worrying too much, and that him ultimately overcoming these bits was what made him a hero).

Appearance: Zero retains his most distinguishing features, such as his bright red and yellow armor, a horned helmet, and a long ponytail of blond hair. His armor is more sleek and humanoid, featuring a lean and muscular look with boots and gauntlets. His helmet is also streamlined, featuring new prongs on either side of his face and black where the previous design had white. Zero's arms no longer change into a buster form, and he instead keeps his various weapons holstered around his body.

Abilities:

Z-Saber: In this series, Zero's Z-Saber has been redesigned and reconfigured along with Zero himself. The Z-Saber now no longer possesses a lightsaber-like appearance, but a deltoid-shaped blade. Furthermore, the Z-Saber received a few upgrades. Unlike in the Megaman X series, the Zero series Z-Saber can be used while running and dashing (however, no combos can be performed while in motion). Additionally, it was created using the same technology as the X-Buster, giving it the ability to be charged and vary its effects and shape. The Z-Saber can be equipped with different chips for element-based charge attacks. In the first two games, Zero has to "relearn" his skill with the Z-Saber, upgrading its attack power and moveset by frequently using it, thus leveling it up. The weapon's most interesting characteristic is the sheer amount of force it can dole out to enemies; it can easily slice through 300 mm of reinforced steel in a single stroke. The Z-Saber can be recharged by drawing energy from Zero himself, who has an internal solar core. Zero can put the Z-Saber into the Buster Shot, allowing it to use vastly more powerful shots and charge shots. Cerveau studies the Z-Saber and reverse-engineers it, allowing it to change into the Shield Boomerang and the three Rods (Triple, Chain, and Recoil). According to concept arts, the Z-Saber is stored within the holster or holsters located on Zero's legs.

Buster Shot: is Zero's long-range weapon; alongside the Z-saber, it appears in all Megaman Zero games. It was originally an old model of a handheld gun used by the late Milan. When Zero awoke, he grabbed Milan's weapon in order to defend Ciel and himself against the attacking Neo Arcadian troops. Once acquired, the Buster Shot's bullets directly changed from regular ammunition to energy shots (or at least appears to in-game), and once the Z-Saber is obtained, the gun can be charged with its help (early concept art and the illustration to the left show that the Z-Saber can be loaded into the buster as a power cell, granting the weapon the ability to be charged this way). Like the Zero series version of the Z-Saber, the Buster Shot can be equipped with element chips, and it had to be upgraded in the first two games. According to concept art, the Buster Shot is mounted onto Zero's back when not used.

Shield Boomerang: The Shield Boomerang is a weapon used by Zero in the first three games, constructed by Cerveau. It is an energy shield created by spinning the Z-Saber (mounted onto his forearm) around, as shown in its artwork. It can reflect most enemy shot attacks, however, it provides no protection from melee attacks, nor is it capable of deflecting exceptionally powerful moves (like those used by bosses). Like most weapons of the series, the Shield Boomerang can be charged and equipped with element chips. When charged, the shield can be thrown like a razor blade, flying in an ellipsis path and cutting through several enemies before returning to Zero.

Triple Rod: is a lance-like weapon appears in the first Mega Man Zero game and SNK vs. Capcom: SVC Chaos. It was constructed by Cerveau from gathered data about Zero. It is a modified Z-Saber hilt which can be extended three times for additional range and has a spear-like energy tip at the top; however, the extension can only be executed if standing still on the ground. It can also be used to attack in eight directions (left, right, up, down, upper left, upper right, lower left and lower right). It can be charged and equipped with element chips. When fully charged, Zero will swing the rod around himself like a battle staff, with an energy tip on both ends; when in mid-air, Zero spins the Triple Rod in front of him.

Chain Rod: is manufactured from the remains of the Triple Rod by Cerveau. It is an energy chain with a sharp point that can be used to hook onto various surfaces and enemies. It can hold some enemies in place by stunning them, pull them closer to Zero for further attacks, or to simply impale them from mid-distance. It can also be used to pull distant items or to hook Zero to a ceiling, swinging on it, similar to a grappling hook, which is occasionally utilized in certain platforming segments.

Recoil Rod: Yet another Z-Saber variation made by Cerveau, the Recoil Rod consists of a pair of energy tonfas used for rapid attacks (which can only be used when on the ground). Similar to the Triple Rod, this weapon can be used to attack in eight directions. The Recoil Rod is also used for some in-game puzzles. By charging the rod, it can be used to push away enemies (if not already destroying them) or moving blocks. Furthermore, when charged and released while holding down, the Recoil Rod allows Zero to make a mighty jump vertically to reach areas normally not possible.

Zero Knuckle: The Zero Knuckle replaces both the Shield Boomerang and the rod weapons, but unlike them, is available from the very beginning. The Knuckle consists of a Z-shaped chip implanted into Zero's palms. It allows him to rip off certain types of weapons (such as blasters, rocket launchers or axes) from enemy Mechaniloids or weak Reploids (such as Weil's Variants) to use them for his own. A successful theft of such a part normally results in the destruction of the enemy. If a stolen weapon is out of ammo or simply of no use any longer, it can be thrown away which can hurt an enemy as well. It cannot be equipped with element chips, but can be charged, though the charged version of the Zero Knuckle is only a stronger punch.

History with Silent: Has known her for a long time, but with his memories gone, he faintly remembers her. Had a fight with her ages back which resulted in him spewing insults and injuring her so bad she fled the base until 200 years passed. Had feelings for her back then, but with his memories gone, he doesn't remember them.

Zero is the titular main protagonist of the Megaman Zero series. After the Megaman X series, Zero offered up his body for anti-virus research, resulting in the creation of the Mother Elf but also the cataclysmic Elf Wars. After helping stop the conflict, Zero sealed himself away again, only to be awoken by Ciel a century later to help the Resistance fight the tyranny of Neo Arcadia.