Lead Rider of [[Kamen Rider 555]], thirteenth show of the Kamen Rider series and fourth of the Heisei generation.

Inui Takumi is a lone wolf who was made the reluctant protector of a suitcase containing the Faiz Gear, using its contents to become Faiz and eliminate Orphnochs, monsters who feed on humans and are said to be humanity's next evolutionary step.

Faiz has a black color scheme with red "photon blood" vessels running across the suit. His design is inspired by the firefly and the Greek letter Φ.

He can change into two advanced forms: the speed-oriented Accel Form and the power-oriented Blaster Form.
仮面ライダーファイズ