Kosuke Nitoh/Zi-O

In 2012, Kosuke Nitoh (仁藤 攻介) was Kamen Rider Beast (仮面ライダービースト), until the creation of Another Wizard erased the Rider's history.

History
In 2018, Nitoh encountered Geiz when the latter was about to fight Another Wizard. However, he nearly got spotted by him which Geiz notice that Nitoh have two Ridewatches in his possession before leaving.

Nitoh continues to observes Geiz, until the latter founds his tent as he reveal himself to Geiz. He then takes out the two Ridewatches to Geiz, knowing what the devices are, but he doesn't have any memories of obtaining them in the first place which cause him to not handing the devices to Geiz until he gets his memories back. Later, Geiz returns to Nitoh's tent and waited for the Another Wizard's defeat which Nitoh regains his memories. Despite this, Nitoh transforms into Beast to fight Geiz, until he calls the fight off. Nitoh then gives Geiz the Wizard Ridewatch but keeps his own Ridewatch instead before Geiz heads to 2012 to stop Another Wizard. Sometimes later, Nitoh is seen leaving to an unknown destination.

Forms
Unlike Wizard, Beast doesn't use alternate forms to combat the Phantoms he consumes. Instead, he uses single shoulder mantle armaments called Mantles (マント) to help him gain an advantage over his foes. Beast "Set, Open! L-I-O-N, Lion! (Lion roar)"

- Transformation announcement

Rider Stats Beast has the ability to absorb the Mana (magical energy) of defeated Phantoms and Ghouls, which take the form of his personal symbol in order to be absorbed into the Beast Driver, allowing the mana to be consumed by his inner Chimera Phantom. When the Beast Ring is set into the Beast Driver and turned the opposite way he used to transform, he can initiate the Strike Beast (ストライクビースト) finisher.
 * Height: 198 cm.
 * Weight: 94 kg.
 * Punching Power: 5.3 t.
 * Kicking Power: 7.5 t.
 * Maximum Jump Height: 31 m.
 * Maximum Running Speed: 100 m. per 4.6 sec.

Appearances: Zi-O Episode 8

Devices

 * Beast Driver - Transformation device
 * Wizard Rings - Gives access to Beast's Rider forms and mantles.
 * Wizard Ring Holder - Carrier strap for Beast's rings

Weapons

 * Dice Saber - Kamen Rider Beast's weapon.

Portrayal
Kosuke Nitoh is portrayed by Tasuku Nagase (永瀬 匡). As Kamen Rider Beast, his suit actor is Jun Watanabe (渡辺 淳).

Appearances

 * Icon-zi-o.png Kamen Rider Zi-O
 * Episode 7: Magic Showtime 2018
 * Episode 8: Beauty & Beast 2012
 * Episode 8.5: The Terrifying Time Paradox!