|This article is about a/an Rider in Kamen Rider Zi-O.|
Ishida (石田) is a young man who become the new user of Kamen Rider Imperer (仮面ライダーインペラー Kamen Raidā Inperā) in 2019.
Ishida is revealed to team up with Shinji Kido on the fourth day. Ishida is unusually dependent on Tezuka and always worrying about his condition, even going as far as believing Tezuka as their Team Leader. However, During the fifth day, he was betrayed and eaten by Tezuka's Evildiver.
Kamen Rider Imperer
- Rider Height: 195 cm
- Rider Weight: 94 kg
- Punching Power: 10 t (200 AP)
- Kicking Power: 20 t (400 AP)
- Maximum Jump Height: 50 m
- Maximum Running Speed: 100 m per 5 seconds
- Sight: 10 km
- Hearing: 18 km
Ishida can transform into Kamen Rider Imperer using his Advent Deck and V-Buckle upon forming a contract with a Gigazelle. His Visor, the Gazelle Visor (ガゼルバイザー Gazeru Baizā), is mounted on his right knee. Imperer's punching power, kicking power, and running speed are identical to Ryuki's, while his jump height is significantly higher.
Through the use of the Spin Vent Advent Card, Imperer can arm himself with the Gazelle Stab (ガゼルスタッブ Gazeru Sutabbu), an arm-mounted pair of drills derived from Gigazelle's horns and forehead.
By using his his Final Vent, Imperer can execute his finisher, the Drive Divider (ドライブディバイダー Doraibu Dibaidā), in which he summons a horde of Zelle Mirror Monsters to surround him and stampede the enemy. Imperer then emerges from the crowd and delivers a knee strike to the opponent's head.
Appearances: Rider Time: Kamen Rider Ryuki
- Main article: Gigazelle
- 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
- Gazelle Visor - Imperer's Visor that enables him to use Advent Cards
Ishida is portrayed by Ryo Shinoda (篠田諒 Shinoda Ryō).
- Much like with the Mirror Riders in the original TV series, he died an ironic death: Ishida's dependence and devotion to Tezuka is his fatal flaw, ultimately leading to his demise at the hands of the latter.
- Mitsuru Sano - The Original User of Kamen Rider Imperer.