Kamen Rider Ryuki
is the main antagonist of "Kamen Rider Ryuki Special: 13 Riders", which takes place in one of the alternate continuities in the "Ryuki" timeline, a 38-year-old rich and charismatic businessman of the Takamizawa Group who is able to transform into the chameleon-themed with the aid of his Contract Monster Biogreeza. He joined the Rider War to add to his already massive wealth so he could take control of the world. He killed Raia and then fatally wounded Ren before being killed by Ren.