Kamen Rider Faiz (仮面ライダーファイズ) is the primary rider of Kamen Rider 555.

Takumi Inui (乾 巧) is a drifter with a mysterious past who got ran into a girl named Mari and got the Faiz Gear. He became the main user of the Faiz Gear and began his battle with the nebulous Smart Brain and the Lucky Clover.

Kamen Rider Faiz uses the Faiz Phone (ファイズフォン) and the Faiz Driver (ファイズドライバー) to transform. He can use the various Faiz Gear as weapons, granting him various abilities. He has a knuckle duster called the Faiz Shot (ファイズショット), a pointer type device called the Faiz Pointer (ファイズポインター), a sword called the Faiz Edge (ファイズエッジ) and his bike the Autovajin (オートバジン). The Autovajin also has the ability to transform into a robot, called Battle Mode. The various gear is activated by inserting the Faiz Mission Memory (ファイズミッションメモリ) into them. Kamen Rider Faiz's finishing attacks are called Exceed Charge (エクシードチャージ) and are performed by inserting the Mission Memory into one of the Faiz Gear and pressing ENTER on the Faiz Phone.

Kamen Rider Faiz has the following finishing attacks:

• Crimson Smash (クリムゾンスマッシュ): Using the Faiz Pointer, Kamen Rider Faiz jumps and creates a drill-like projection on the enemy. Faiz then kicks into the projection, drilling into the enemy and destroying them.
• Grand Impact (グランドインパクト): Using the Faiz Shot, Kamen Rider Faiz punches the enemy.
• Sparkle Cut (スパークルカット): Using the Faiz Edge, Kamen Rider Faiz suspends the enemy in an anti-gravity cage, before running up and slashing them.

First appearance: Kamen Rider 555 Episode 1