Night Rogue

"The war has begun..."

- Night Rogue's first words in the show

Night Rogue (ナイトローグ), informally known simply as the Bat Man (蝙蝠男), is one of the main villains in Kamen Rider Build. He is a mysterious masked figure that is present during Faust's experiments that turn victims into Smash, including the one from Sento Kiryu's memories.

History
Night Rogue is known to be a leader of Faust. He watches over the human experimentation it conducts and appears in Sento Kiryu's mostly forgotten memories from before his escape, sitting atop a throne. According to Night Rogue himself, the reason behind these experimentations is to accomplish one of Faust's objectives: to create the "Ultimate Lifeform."

Personality
While little is known about him, Night Rogue's shown to be very malicious. Seeing innocent people as mere guinea pigs, he doesn't hesitate to experiment on them, even when fully knowing that his subjects would be too weak to survive.

Forms
"Bat! Mistmatch! Bat! Ba-Bat! Fire!"

- Transformation announcement

Ability Perimeters:
 * Height: 197.5 cm.
 * Weight: 103.0 kg.
 * Punching power: 17.2 t.
 * Kicking power: 20.5 t.
 * Maximum jump height: 49.0 m.
 * Maximum running speed: 100 m. per 4.1 sec.

Like Blood Stark, Night Rogue's form is accessed with the Transteam Gun and the Bat Full Bottle.

Night Rogue seems to possess a degree of steam manipulation as Night Rogue can turn himself into steam to quickly travel long distances or to summon his Steam Blade. Night Rouge is also shown to be able to fly as well as stand upside down by using his feet to somehow cling to ceilings like a real bat. He can also execute an electrified Rider Punch-esque attack where his fist glows blue with electric energy and hits the target.

Unlike Build, Night Rogue's Ability Perimeters are not spread out between his arms and legs. While Night Rogue gets power from only one Full Bottle, he's much stronger than Build's Trial Forms and his stats even surpass some of Build's Best Matches.

Devices

 * Transteam Gun - Transformation device and personal weapon.
 * Full Bottles - Transformation trinkets.

Weapons

 * Steam Blade - Standard sidearm weapon. Can combine with the Transteam Gun to form the Steam Rifle.

Portrayal
Night Rogue's voice actor is currently unknown at that time but his suit actor is Jun Watanabe (渡辺淳), who played Secondary Riders since Kamen Rider Drive.

Etymology
Night Rogue's name is a loose play on English words "Nitro" and "Rogue".