Geiz Myoukouin (Prime Reality)

Geiz Myoukouin (明光院 ゲイツ), is a warrior from the year 2068 who transforms into Kamen Rider Geiz (仮面ライダーゲイツ), the secondary rider of Kamen Rider Zi-O.

Power & Abilities

 * Stealth Proficiency: Geiz is able to discreetly follow a target or arrive where said target will appear without notice.
 * German Language Interpretation: Geiz has knowledge of German language as seen when he read Emu's note of the bug of the Another Ex Aid's gate to come inside the game.
 * Genius-Level Intellect: At the very least, his use of BuildArmor and his finisher, Vortex Time Burst, indicate that Geiz is proficient in equation and scientific formulae.

Devices

 * Ziku Driver - Transformation device
 * Ride Watches - Transformation trinkets
 * Faiz Phone X - Communication device

Weapons
Handheld weapons:
 * Zikan Zax - Geiz's personal weapon
 * Faiz Phone X - Upgraded version of the SB-555P Faiz Phone wielded by Faiz Armor

Suit-equipped weapons:
 * Shift Speed Speeds - Autonomous attack units provided by Drive Armor
 * Faiz Pointer Pointer - Faiz Armor's replica of the SB-555L Faiz Pointer accessed using the Faiz Phone X

Vehicles

 * Ride Striker
 * Time Mazine

Portrayal
Geiz Myoukouin is portrayed by Gaku Oshida (押田 岳).

Etymology
"Geiz" is a German word which means "stinginess" or "miserliness". However, according to Woz, Geiz actually means "King" (王) in their series as a counterpart to "Zi-O". It is a pun on English word "Gates" since in Japanese and Ancient Egyptian culture, and  both having "gate" etymologies: "a gate connects god and human" or "a gate connects humanity and future". The reason why using "Gates" instead of "Gate" is because of Toei staff's superstition. It is later implied another reason for his name being "Gates" instead of "Gate" is due to the already existing use of the word Gate back in Kamen Rider Wizard.