Koya Nishihori is a criminologist-turned-criminal who earned the nickname "Copycat Pirate" for mimicking the styles of famous criminals and an antagonist in Kamen Rider Drive.
Originally working as a criminologist, after being humiliated in front of the public, Koya Nishihori adopted the persona of Copycat Pirate plagiarizing their modus operandi of several famous criminals and attacking the public to get revenge.
Shortly prior to the Global Freeze in April 2014, Nishihori took hostages in the style of the terrorist group Neo-Shade. However, police officers Shinnosuke Tomari and Akira Hayase arrived the location where the video was filmed and save the hostages and reveal the "Copycat Pirate"'s identity. Before Shinnosuke could arrest him, they were attacked by Roidmude 005, giving Nishihori an opportunity to escape.
However, Heavy Acceleration started to happen as Koya was taken by Roidmude 005, who copied his data before dropping him from a great height. However, Kamen Rider Protodrive showed up just in time to save him. Nishihori later wakes up and is found by Shinnosuke.t Nishihori attempted to warn him about the Roidmude but the detective ignores hihand arrests him.
While Nishihori was in prison, 005 assumed his form and began operating as the "Copycat Pirate" but was destroyed by Shinnosuke Tomari as Kamen Rider Drive.
In December 2014, Nishihori was visited by Shinnosuke for information on the late Goro Minami. Nishihori asked him if the rumors that the detective had fought had fought Lupin were true, but Shinnosuke quickly changed the subject. He told Shinnosuke that he knew the ending of the Unholy Night, causing Shinnosuke to demand he reveal the ending.
In the novel Kamen Rider Drive Saga: Kamen Rider Mach, he attempt to digitize himself to fuse with entire World Wide Web use the Anima System which Masahiko Odagiri invented, but died in a freak accident where the system had a short circuit, destroying both the system along with Nishihori's consciousness, leaving only his corpse and Go was too late to save him.
005, now gone by the new form of Revenger Roidmude, later copied Koya's appearance to enact his revenge against Kamen Riders.