Jun Shibaura/Zi-O

In 2002, Jun Shibaura (芝浦 淳) was Kamen Rider Gai (仮面ライダーガイ). Seventeen years later, a new Rider Fight begins and Jun returns as Gai once more.

Advent Again
In 2019, a mysterious person restarted the Mirror World Battle Fight. At the same time, Jun and other Mirror World Riders regained their memories and ability to transform. Jun was later seen transforming alongside Ishihashi and Tozuka, the new users of the Scissors and Tiger Advent Deck. The gang was opposed to Miyuki Tezuka's gang, which consisted of Shinji Kido, Kimura, and Ishida. They encountered one another at an abandoned house.

A huge battle broke out. Jun and his gang retreated when they were assaulted by a horde of Mirror Monsters. He would later have a discussion offscreen with Miyuki Tezuka, with Tezuka wanting the two sides to team up for a better chance of survival. Unfortunately, Tezuka betrayed his team and sided with Jun, resulting in Shinji, Kimura, and Ishida being cornered and helpless. Ishida would later be killed by Tezuka's Evildiver. As Jun and the others were preparing to finish off Shinji and Kimura, Kamen Rider Ouja appeared and used his Final Vent on one of Jun's comrades: Tozuka, killing him. Gai fought Ouja for a brief while before Ouja turned his attention to Shinji Kido.

Another Alternative
He, along with Miyuki Tezuka and Ishihashi was celebrating their victory with barbeque. However, Tezuka immediately betrayed Ishihashi by stabbing him with a table knife, with Jun following right after. It would also be revealed that he was in love with Tezuka and they appeared to be in a romantic relationship together.

However, it was short lived as the latter eventually betrayed him after being provoked by Dark Shinji. Jun and Tezuka later fought, with Jun becoming the victor. However, a dying Tezuka managed to flee. Jun wandered about and called for Tezuka in distraught, rambling about accepting his "love". Unfortunately, Jun ended up fighting Dark Shinji, who said Tezuka died and he would "love" Jun in Tezuka's place instead. Ryuga's Final Vent put an end to his life. Ryuga stomped on Jun's body as he disintegrated, much to the horror of Ren and Kimura. This make Shibaura the sixth eliminated rider and surviving rider in the Rider Fight.

Forms
Kamen Rider Gai Rider Statistics Rider Senses: Ability Parameters: Special Attacks:
 * Rider Height: 195 cm.
 * Rider Weight: 100 kg.
 * Eyesight: 8 km.
 * Hearing: 10 km.
 * Punching Power: 300 AP (15 t.)
 * Kicking Power: 300 AP (15 t.)
 * Maximum Jump Height: 20 m.
 * Maximum Running Speed: 100 m. per 5 sec.
 * Metal Horn: 2000 AP (100 t.)
 * Heavy Pressure: 5000 AP (250 t.)
 * Advent: Metalgelas: 4000 AP (200 t.)

Jun can transform into Kamen Rider Gai using his Advent Deck and V-Buckle upon forming a contract with Metalgelas. His Visor, the Metal Visor (メタルバイザー), is mounted in his left shoulder. Gai's punching power and kicking power are identical to Zolda's, while his jump height and running speed are higher. However, his jump height is still overall poor in comparison to the rest of the 13 Riders.

Through the use of his Strike Vent Advent Card, Gai can arm himself with the Metal Horn (メタルホーン), a gauntlet derived from Metalgelas' head.

By using his Final Vent, Gai can execute his finisher, Heavy Pressure (ヘビープレッシャー), which equips him with the Metal Horn if he does not already possess it. Gai next grabs onto Metalgelas' head with his legs and points the Metal Horn in front of him. Metalgelas then runs into the enemy, resulting in Gai striking it with the Metal Horn.

Appearances: Rider Time: Kamen Rider Ryuki Episodes 1-3

Equipment

 * Advent Deck - Transformation device and Advent Card holder
 * V-Buckle - Transformation belt
 * Advent Cards - Trinkets that enable a Rider to summon Contract Monsters, access equipment, and use special abilities
 * Metal Visor - Gai's Visor that enables him to use Advent Cards

Portrayal
Jun Shibaura is portrayed by Satoshi Ichijo (一條 俊).

Appearances

 * Icon-zi-o.png Kamen Rider Zi-O
 * Icon-ryuuki.png Rider Time: Kamen Rider Ryuki