Rai Washio

<tabber>
1=
|-|
2=
|-|
3=
</tabber>
 was the younger brother of Fu Washio, hailing from Seito. He was able to transform into the white Kaiser, .
==History==
===Background===
Rai Washio is the younger brother of Fu Washio hailing from Seito. Both brothers were amoung several orphans adopted by Namba Heavy Industries President, Juzaburo Namba. As one of the "Namba Children", he pledges absolute loyalty to Namba Heavy Industries. It is there where Rai and Fu were indoctrinated and trained as soldiers.
===Japanese Civil War===
Rai and Fu made their first presence during Seito's invasion on Hokuto after Kiba defeats Seito Guardians as Owl Hazard Smash. They quickly defeat the latter as Remocon and Engine Bro's easily and taunt Kazumi Sawatari to become Seito weapon, if he wants Kiba to live. After they torture Kiba, Kazumi arrives with Akaba where he rejects Rai offer. When Grease and Akaba tried to escape with Kiba, Fu had the upper hand until Kiba shielded him. As Kazumi and Akaba reach the Touto borders, Sento Kiryu and Ryuga Banjo awaited to battle the Washio brothers, until they were finally aided by Kamen Rider Rogue. 
Joining Seito's forces in an attack on the Touto government office, the Washio brothers covered Rogue as he went in to claim the Pandora Box, engaging Kamen Riders, Cross-Z Charge, Grease and Build before the latter caught up with Rogue. Eventually, the Kaisers succeeded in defeating Cross-Z Charge and Grease.
Alongside Rogue, the Washio brothers represented Seito in a three-stage proxy battle with Touto. Fu faced Grease in the first round and initially overwhelmed the Kamen Rider only to be shockingly defeated when Grease, recalling his deceased comrades, persevered and struck back at Engine Bro's. With Rai defeated, his Gear Engine was used by Fu alongside the Gear Remocon to face Cross-Z Charge as their combined form, Hell Bro's in the second round. During their battle, Fu claimed to Ryuga that, since his brother had failed, Rai had been taken away by Seito with his survival depending on the elder Washio's victory, using the resulting hesitation in Ryuga to knock him out of the contest. Soon after, Rai arrived, having been unharmed, and gloated with his brother. 
===The Evolto Revolution===
Although the war between Touto and Seito had come to a close with the proxy battle, Blood Stalk decided to press on used the completed Pandora Box to transfigure Sky Wall into the Pandora Tower after inserting the Fullbottles into the Panels. As Seito continued their invasion on Touto, the Washio brothers accompanied Stalk at the Touto-Hokuto border and combatted Build, Cross-Z Charge, and Grease. Although Rai held Misora hostage, they were forced aside by the presence of Vernage who took control of Misora's body and took the Kamen Riders away from the battle.
The Washio brothers continue to accompany Blood Stalk as the Kamen Riders stormed the Pandora Tower to reclaim the Pandora Box from Seito's custody. Rai engages with Cross-Z, who uses the Magma Knuckle to completely overwhelm him in battle. After Rai gets defeated, Fu receives the Gear Engine to become Hell Bro's once more. Although Blood Stalk arrived to create a new battlefield using the Pandora Box, Hell Bro's is defeated by Build TankTank Form, and the Kamen Riders continue pursuing Stalk and reclaim the Pandora Box.
===Final Battle And Death===
After Evolto declares his intentions to rule the world to Namba, Nariaki Utsumi decides to strengthen the Washio brothers by injecting them with an extra dose of Nebula Gas, that puts them in risk of disintegrating their bodies. However, even with the conditioning and temporary alliance with the Kamen Riders, Kamen Rider Evol Black Hole is still too much for them to handle. Evol then generates a black hole at Engine Bro's. As the black hole began to tear him apart, Rai give his Gear Engine to his brother and swears his absolute allegiance for Namba Heavy Industries as he fades away.
===Post-mortem===
Despite not showing in the new world, it is implied that Rai (alongside his brother Fu Washio) was also revived in new world after world merging incident. 
When Killbus reactivated the Pandora Box, everyone who directly exposed to the Nebula Gas regained their memories from the old world, Rai is possibly also among the people who got back their memories alongside with his big brother, Fu.
==Personality==
Compared to his brother, Rai was more outspoken and seems to be prideful with his abilities. He has a tendency to mock his opponent to let his/her guard down. He also doesn't hesitate to use underhanded tricks, like capturing an unconscious Misora and keeping her hostage to force Touto's Kamen Riders to relinquish their Fullbottles. Nevertheless, both Fu and Rai are cruel and ruthless and like to torture their defeated opponents.
==Forms==
==Equipment==
===Devices===
*Nebulasteam Gun - Transformation device and personal weapon. Shared with Remocon Bro's.
*Gears -Transformation trinkets
*Fullbottles - Used for special attacks
===Weapons===
*Steam Blade - Standard sidearm weapon. Can combine with the Nebulasteam Gun to form the Nebulasteam Rifle. Shared with Remocon Bro's.
==Behind the Scenes==
===Portrayal===
Rai is portrayed by . As a teenager, he is portrayed by , who previously played a baby in Kamen Rider Den-O and also the son of suit actor Jun Watanabe.
As Engine Bro's, his suit actors were and the late .
===Etymology===
The Kanji that makes up Rai's first name (雷) translates to "thunder". This also explains the meaning behind his prideful and boastful personality: "Loud like thunder".
==Appearances==
==References==
==Navigation==
ru:Рай Вашио
Category:Build Characters
Category:Deceased
Category:Debatable Riders
Category:Build Riders
Category:Generals
Category:Namba Heavy Industries Ltd.
Category:Antivillains
Category:Villains