Vile

Vile is a major antagonist in the X Chronicles series. He used to be a member of the Maverick Hunters prior to the events of Rise of Sigma. He appears in Rise of Sigma and Doppler Effect as an antagonist, and was ultimately incarcerated in Maverick Hunter HQ, in an attempt to stabilize him. He clearly is a lost cause, though.

Appearance
Zero describes Vile as a Reploid who was designed to be a war machine. Vile is adorned in basic armor with a distinct purple sheen and gold highlights. Like some Maverick Hunters, Vile wears a helmet with a T-shaped visor that conceals his face in shadow. It is unknown if this is his face or if it just hides his real face. Attached to his shoulder is a cannon featuring an ammo belt arching into a pack on his back.

Vile's appearance throughout the series is consistent, albeit he has different paint jobs in both of his main appearances: in Rise of Sigma, Vile is purple, while he's blue in Doppler Effect.

Personality
Vile is an arrogant and violent individual. Though he used to be a Special A class member of the Maverick Hunters, Vile had an abnormality in his electronic brain that made him ruthlessly hunt down Mavericks and totally annihilate them, without regard for collateral damage. Due to being a borderline Maverick, he was removed from duty and detained, being freed during Sigma's rebellion so he can cause as much destruction as he wishes. Despite his callous and unruly nature, he is still a clever fighter, carefully retreating after Zero damages his Ride Armor and later trapping him in a cage to keep him out of the way.

While Vile originally looked down on X, he developed a grudge against X after being resurrected and upgraded by Dr. Doppler, ignoring the doctor's plans and going off to fight X on his own terms.

Rise of Sigma
Vile first appeared in the Central Highway, where he jumps from Death Rogumer using a powerful Ride Armor to attack X. X is unable to cause damage to Vile's Ride Armor, and after taking some damage, he is eventually caught by Vile's paralyzing beam, and had to be rescued by Zero, who damages Vile's Ride Armor and forces him to retreat.

When X and Zero later attacked Sigma's fortress, Vile rushed to stop them. While Zero chased after him, X was left behind for a moment. During this time, Vile had jumped aboard his new Ride Armor, had imprisoned Zero in a cage, and used him to blackmail X to surrender. X fought him, however, up to a point until he was again caught by Vile's stun attack. In order to save his friend, Zero mobilized all of his power to break free and destroyed the Ride Armor by overloading his Zero Buster. Vile shrugs off the attack by Zero and denounces his action as a "worthless gesture" and pointing out he cannot be beaten easily before telling X ominously that it's only the two of them now. Unfortunately for Vile, X went insane, much to Vile's shock. X then completely destroyed Vile.

Doppler Effect
What was left of Vile after his destruction at the hands of X in the first game was salvaged. A Reploid scientist named Dr. Doppler, who was infected with the Sigma Virus and controlled by Sigma himself, created a new body for Vile and upgraded his weapons to be more powerful. However, the only thing Vile could think of was to get revenge on X, who had previously killed him. Instead of assisting Doppler in creating a new body for Sigma, he left Doppler's lab on his own accord.

Vile MK-II lured X into an abandoned factory and fought him with the Ride Armor Kangaroo. However, after a while, he ran away and set up the factory to self-destruct while humans were inside. Luckily for the humans, X managed to take them out of the factory before it blew up. Vile then reappeared at Dr. Doppler's Laboratory as one of the final bosses, riding the Ride Armor Goliath. There, X and Zero defeat and incarcerate him.

Rise of Repliforce
After his defeat, Vile was incarcerated and and had his weapons stripped away. He was given the offer to see a psychiatrist, but he refused. During the Repliforce incident, X asked Vile why he refused, to which Vile replied that X was doomed to ultimately lose, no matter what X did, and it didn't actually matter whether or not Vile would contribute to X's fall. This scene shows that Vile was purely psychotic.

Trivia

 * Vile's design is inspired from Boba Fett from the Star Wars franchise. Capcom even feared that they might be sued because of Vile.
 * Vile is one of the handful of Mavericks who was neither infected nor misjudged: he is most likely a free-willed Maverick, like Bit, Byte, Double and Magma Dragoon.
 * Coincidentally, Vile, Bit and Byte were incarcerated together, during the events of Doppler Effect.