Vail

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 is Junpei Shiranami's inner demon and the source of his powers as . He later transformed into to resolve his 25-year-long conflict with Genta. 
==History==
===Background===
Vail was the inner demon residing within Junpei Shiranami, awakened as part of NOAH's experiments. When he first materialized, Vail devoured Junpei's parents before he was sealed into a belt created by Masumi Karizaki. Junpei used the Vail Driver to operate as a Kamen Rider and confided to Vail as a "companion." Once they briefly separated, Junpei discovered that he was the "red demon" that killed his parents and the two fought in an ensuing battle. As Vail attempted to rejoin with his host, he was sealed into the Demons Driver by Masumi Karizaki, which resulted in the destruction of NOAH. 
Although believed to be lost, the Demons Driver was later recovered by Hideo Akaishi from the wreckage of NOAH. By 2004, Vail discovered that Junpei had changed his name to "Genta Igarashi" and located him at Happy Spa. There, Vail possessed Genta and attempted revenge by setting fire to the bathhouse. However, Vail was thwarted by Vice's intervention, and he was resealed back into the Demons Driver.
===As the Demons Driver===
The Demons Driver was given to Hiromi Kadota by George Karizaki, who withheld the fact that it carried a demon within it. Hiromi initially used the belt to transform into Kamen Rider Demons, he was unable to use the belt's full potential. According to Akaishi and Karizaki, the pulsations generated by Giff had reawakened Vail. As such, Vail began speaking to Hiromi as the Demons Driver.
The increased use of the belt caused Hiromi to age rapidly and he was fortunately separated from the Demons Driver before it could eat away his life. After Hiromi surrendered the Driver to Fenix, director Akaishi gave the Driver to Orteca, whom Vail recognized as a "fellow demon". Unlike Hiromi, Orteca was able to draw out the hidden power of the Demons Driver and effortlessly defeat the Igarashi siblings in their most recent upgrade forms. 
When Orteca had George Karizaki to adjust the Demons Driver, Vail was released from his confinement and made his way back into the Vail Driver where he re-greeted the man who sealed him away, Masumi. This allowed him to reunite with Genta and possess him once again as Kamen Rider Vail, destroying two Gifftarians before turning his sights on Ikki. Before Vail could do any major harm, Genta regained control over his body and the Vail Driver was damaged.
With Genta now in hiding from Vail, Vail returned to the Demons Driver to assist Orteca, but the latter was quickly overwhelmed and defeated by Daiji Igarashi, who had rid himself from Kagero and became Kamen Rider Holy Live. Vail abandoned the Demons Driver for good and awaited alongside Hideo Akaishi for further orders from Giff.
===Return of the Red Demon===
At this point in time, Vail had no corporeal form and could only be seen by Akaishi. Although Akemi Mikoshiba could not see Vail, she suspected that Akaishi was cooperating with a certain someone. After her capture, Akaishi allowed a now materialized Vail into the human realm, who now intended to reunite with his old partner and kill the Igarashi family.
After several failed attempts at killing Ikki, Vail set his sights on Yukimi Igarashi, which inadvertently put him into the crosshairs with Vice as he ridiculed his now human-like pride. Vice is unsettled by Vail's upsetful words and stands up for himself. Though Vail did stop targeting Vice, he attacked Hana Natsuki for being Sakura Igarashi's weakness and kidnapped Go Tamaki, though this resulted into Hana becoming Kamen Rider Aguilera who was able to drive Vail away.
With humanity how attempting to rise against ARARAT with Weekend's revolution, Vail was selected by Akaishi to lead the crusade for Giff. When Genta underwent an operation to remove Giff's cells, Vail was temporarily disabled due to his connection with his host. With Daiji succumbing to his blind sense of justice, Vail offered to team up while lamenting how they lacked partners. Although Daiji harshly rejected his offer, Vail voluntarily became Live's tag parter against Ultimate Revice. While Vail continued to cause trouble against humanity, his frequent energy losses made him unable to maintain his body any further, even with Akaishi's help.
 
With his body at his limit, he is approached by Masumi who offered him the Crimson Vail Vistamp in exchange for battling Genta one last time. On the day of the decisive battle, he transformed into Crimson Vail and confronted Genta as the new Kamen Rider Destream. After a decisive battle, Genta revealed his true intention to coexist with Vail after learning of Ikki's long-lasting relationship with Vice. Though Vail teased that he wouldn't forgive Genta, he admitted defeat and allowed himself to be absorbed.
===Kamen Rider Revice: Battle Familia===
While dormant in his host as he was captured by Azuma's forces, Vail emerged out of Genta's body along with Yukimi's own demon, uniting to purify the Igarashi siblings' own demons back to normal and evolve the Thunder Gale Vistamp into the Fifty Gale Vistamp.
==Personality==
Vail is a demon who manipulates others to achieve his personal objectives, saying that he fights as he pleases. While he will allow anyone to use the Demons Driver, he will proceed to steal their life force should he feel he does not relate to them in a personal matter, as well as prevent them from using multiple Genomix forms.
He considers Genta to be his one and only companion. This causes him to act more possessive and obsessive towards his host, going as far as attempting to kill Yukimi and their children. Vail selfishly reasons that they had taken his companion away from him, even claiming that Genta "betrayed" him. However, after losing his final battle against Genta, Vail realizes the man standing in front of him now was no longer the vengeful man that he once knew, as his host reaffirms the new man he had now become. Therefore, he finally surrendered by being absorbed once and for all.
Vail also has his own pride as a demon and laments Vice for discarding it in exchange for a human relationship.
==Powers==
*Demon Physiology: As a demon, he possesses the following characteristics:
**Possession: Vail can possess either the Demons or Vail Driver as a core to allow a user to transform. Using the Vail Driver, he can additionally possess his host, Genta Igarashi. Via possession, he also has additional powers:
***Life Force Depletion: If Vail chooses to do so, he can steal the life force of its user over time in order to restore himself, resulting in the user's health deteriorating to the point that their organs and bodily functions register as those of an 80-year-old.
***Demons Driver Restriction: Vail can restrict the Driver's user from using additional Genomix forms by repelling a Vistamp away from its screen.
===Weaknesses===
*Genta Igarashi/Junpei Shiranami: Vail is dependent on his host, Genta. As such, he gets weakened when the host is on the brink of death, and will die if Genta is killed as well. 
*Energy Loss: Despite having his physical body restored by Giff, Vail can only sustain it for a certain amount of time before being forced to return to his immaterial form due to running out of energy. This can be remedied by stamping Proto Vistamps on Vail's body to replenish his energy. However, Vail's physical body would eventually destabilize to a point where even Proto Vistamps became insufficient to counteract the energy losses which had continued to accelerate at a faster rate.
==Forms==
==Equipment==
===Devices===
*Vail Driver - Transformation device as Kamen Rider Vail
*Vistamps - Transformation trinkets
*Vistamp Holder - Carrying straps for Vistamps
*Crimson Vail Vistamp - Transformation device and personal weapon as Crimson Vail
==Possessions==
Vail Demons Driver.png|Demons Driver
Vail in Vail Driver.png|Vail Driver
Vail in Junpei Shiranami.png|Junpei Shiranami
Vail in Genta Igarashi.png|Genta Igarashi (Junpei's second identity)
==Relationships==
===Allies===
*Daiji Igarashi/Kamen Rider Live: As Daiji serves Giff & Akaishi, Vail tries to persuade him to be his partner against his family. But Daiji refused him, even though he helped him against Revice.
*Hideo Akaishi: Hideo found Vail within the Demons Driver. Once freed again after Orteca lost to Live, Vail partners with Hideo for Giff's reign. Hideo accepts him going after Genta, but forbids him from killing Genta's children.
*Orteca/Kamen Rider Demons (II): Vail recognized Orteca as a fellow demon (despite the latter no longer being a Gifftex) and allowed him to utilize a Double Genomix without any negative side-effects. However, he later prevented Orteca from using a Quad Genomix, revealing that he had his own separate agenda that does not include Orteca. Vail later returns to Orteca, after being ejected by Genta. Deciding to stick around with Orteca for a while, they unlock Demons' Quad Genomix. Vail then leaves him and the Demons Driver, after Orteca lost his cool against Live.
*Giff: Vail's ancestor. While he does not seem too invested in Giff's designs, Vail willingly serves him for the opportunity to enact revenge against his previous host. He is wary enough of Giff's power that he will not defy him even when his directions clash with Vail's personal desires. When Akaishi relayed Giff's directions that Vail not destroy any of the Igarashi siblings, Vail instead decided to focus his efforts on Genta rather than his children.
===Enemies===
*Genta/Kamen Rider Vail/Kamen Rider Destream: Vail was Genta's demon back as Junpei Shiranami and they used to work together as Kamen Rider Vail until revealed he was the one killed his parents before Masumi sealed him away. After their final battle, Vail accepts Genta's forgiveness and allows himself to be reabsorbed into him, gaining some form of closure with his former host.
*Hiromi Kadota/Kamen Rider Demons (I): While it was unknown to others, Vail had already been draining Hiromi's life force ever since he transformed into a Kamen Rider for the first time. As time passed, Vail decided to show his true nature to Hiromi before transforming into Demons, making Hiromi unsure whether to transform or not. Later, Vail drained Hiromi's life force to the degree of making Hiromi's internal organs and bodily fluids the equivalent of an 80 year old.
*Ikki Igarashi/Kamen Rider Revi: Vail attempted to convince Ikki to give up on human life and have Vice live out the rest of his life as a demon like Vail. However as Ikki pointed out, Vail is afraid of the happy life that the Igarashi family has.
*(Kamen Rider) Vice: Even though he and Vice are the inner demons of Ikki & Genta/Junpei, Vail tempts Vice to walk the path of a demon once again, knowing how Genta abandoned him & that Vice would suffer the same fate if Ikki leaves him too. But Vice refuses to let it happen.
*Sakura Igarashi/Kamen Rider Jeanne: Vail fights Sakura as he tries to search for Genta. In order to break her to find his former host, he goes after Hana.
*Hana Natsuki/(Kamen Rider) Aguilera: Vail tries to go after Hana and kill her, in order to make Sakura suffer & find Genta's hiding place. When Hana became a Kamen Rider, he was forced to retreat after being beaten by her.
*Yukimi Igarashi: Back when Genta was Junpei at a young age, Vail tried to get Genta to kill her, seeing Yukimi as a threat and a hinderance to their "relationship". Luckily, Genta broke free of his influence. He considers her the main reason for Junpei's change and rejection of him and despises her.
*George Karizaki/Kamen Rider Demons (III)/Kamen Rider Juuga: to be added
*Go Tamaki: Tamaki tried to protect Hana from Vail and allowed himself to be captured by him as part of his trial in joining Weekend.
*Shozo Irabu: Shozo was around the time when he, Genta and Yukimi were young, when Vail destroyed NOAH.
*Masumi Karizaki: As Vail and Genta fought, at the last moment, Masumi used the Demons Driver to seal Vail away, knowing that both him and Genta would disappear. Vail meets Masumi again in the Vail Driver, as he seeks out Genta once again. As Vail's power began to slowly fade away, Masumi gave him the Crimson Vistamp as a means of ending the feud between him and Genta once & for all.
==Behind the Scenes==
===Portrayal===
* Vail is voiced by , who also voices the Demons and Vail Drivers.
* While possessing Genta, he is portrayed by .
* His suit actor in his demon form and as Crimson Vail is . As Kamen Rider Vail, his suit actor is .
===Etymology===
The name comes from the word "Vail" which means "to surrender," fitting in with Vail's theme of surrendering to one's basic instincts, or surrendering one's soul to the devil.Spacecraft 176 2022, pp. 26–29, "DETAIL OF HEROES 57th Kamen Rider Vail"
==Notes==
*Vail's suit is retooled from an early Vice suit used in Kamen Rider Revice: The Movie, with red accents and a new head featuring a fanged mouth instead of Vice's face mask.『仮面ライダーリバイス特写写真集 Buddy up!』ホビージャパン、2023年3月31日。ISBN 978-4-7986-3126-4。
*While the aftermath of Vail's destruction of Happy Spa wasn't explicitly discussed, the dialogue between the two strongly implied that Vice played a role in thwarting Vail 18 years prior the series.
*Crimson Vail is a modified Jack Revice suit, with the blue and silver replaced with purple and red and a modified Buddy Buckle replacing the Revice Driver, as well as an original design on the chest.
*TV-Asahi lists "Crimson Vail" as a non-Rider on their website.https://www.tv-asahi.co.jp/revice/rider/https://www.tv-asahi.co.jp/revice/rider/crimsonvail/ Various other details point to Crimson Vail being a non-Rider, such as the transformation announcement explicitly not naming him as one, as compared to the other Kamen Riders.
**However, there is one instance of Crimson Vail being named as "Kamen Rider Crimson Vail" in the item description of the DX Crimson Vail Vistamp,https://p-bandai.jp/item/item-1000175974/https://mantan-web.jp/article/20220703dog00m200045000c.html which puts his Kamen Rider status as debatable.
*Vail's transformation pose as Crimson Vail is based on the image of wrist cutting.『OFFICIAL PERFECT BOOK 仮面ライダーリバイス公式完全読本 HERO×DEVIL'S SCRIPTURE』〈ホビージャパンMOOK〉、ホビージャパン、2023年2月28日。ISBN 978-4-7986-3090-8。
==Appearances==
==Navigation==
Category:Revice Characters
Category:Revice Riders
Category:Non-human Riders
Category:Debatable Riders
Category:Villains
Category:Reiwa Era Riders
Category:Demon Monsters
Category:Inner Demon
Category:Demons