He is labeled as the ruler of Mirror World, he is the mirror version of Kamen Rider Agito's Burning Form. He gathered the Mirror Monsters in a plan to destroy the Kamen Riders, which confused Ryuki to see the monsters actually use teamwork. But once Agito arrived, Ryuki found out his Dragon Rider Kick had no effect on the Fake Agito. Though it took Ryuki and Agito's Double Rider Kick to destroy him, Fake Agito was actually a dream and nothing more.
This version of Agito's Burning Form appears with red eyes rather than yellow.