Hideyuki Kagawa

was the real identity of , an imitation of the 13 Riders.
==History==
Prior to Kanzaki's experiment, Kagawa wandered into Room 401 at Seimeiin University one day and happened to see Shiro Kanzaki's notebook lying on the floor. He scooped it up, opened it and gave every intriguing page a once-over glance before Kanzaki snatched it from him. However, Kagawa had photographic memory and remembered what he had read. After learning the severe nature of Kanzaki's experiments, Kagawa began to duplicate Kanzaki's work in order to close the Mirror World. To that end, he formed a relationship with Satoru Tojo and Hajime Nakamura, with Kagawa eventually creating the Alternative decks.
Kagawa was a married man, with a young son named Yuuta. Though he deeply loved both his wife and son, he did not let Kanzaki's threat to their lives deter him from his course to close the Mirror World. Unfortunately, he died for it at the hands of Satoru, who did it based on the man's word that "a hero must sacrifice the one they love". Satoru would come to regret his deed in the name of heroism.
==Alternative Zero==
Alternative Zero
;Rider StatisticsTV Asahi. (2002). Pseudo Rider.. (2003). Kamen Rider Ryuki: Hybrid File. p. 73. ISBN 978-4840224284.Zukan's page for Alternative Zero. (2003). Kamen Rider Ryuki Complete Works. Second Volume. p. 42. ISBN 978-4091014856.Kamen Rider Official Data/Perfect File.Kodansha. (2015). Kamen Rider Official Mook. Heisei Vol. 03. p. 14. ISBN 978-4063535532.
*Rider Height: 190 cm
*Rider Weight: 93 kg
;Rider Senses
*Eyesight: 20 km
*Hearing: 15 km
;Ability Parameters
*Punching Power: 15 t (300 AP)
*Kicking Power: 22.5 t (450 AP)
*Maximum Jump Height: 50 m
*Maximum Running Speed: 100 m per 4.5 seconds
;Special Attacks
*Slash Dagger: 100 t (2000 AP)
*Accelerated Attacks: 125 t (2500 AP)
*Psycoroader: 225 t (4500 AP)
*Dead End: 400 t (8000 AP)
*Advent: Psyco-Rogue: 325 t (6500 AP)
KRRy-Alternative Zero (With Slashdagger).png|Alternative Zero armed with Slashdagger
Kagawa transforms into Alternative Zero using his version of the Card Deck and V Buckle. Alternative Zero is the prototype model of Alternative, a mimicry of the 13 Riders created by Kagawa using Shiro Kanzaki's notes on the Mirror World. The completed version of Alternative is used by Hajime Nakamura. Both versions are identical with the exception of the color of the tubes on the shoulders and Alternative Zero being shorter and lighter. Although it is unclear if the two are contracted in the same way as the 13 Riders and their Contract Monsters, the Mirror Monster Psyco-Rogue can be summoned by Alternative Zero and follows his commands. Alternative Zero's Visor, the Slashvisor, is a gauntlet mounted on his right arm.
Through the use of his Sword Vent, Alternative Zero can arm himself with the , a sword derived from Psyco-Rogue's forearms. By using the Wheel Vent, Alternative Zero can transform Psyco-Rogue into motorcycle mode named the for him to ride.
By using his Final Vent, Alternative Zero can execute his finisher, the , which transforms Psyco-Rogue into the Psycoroader if it has not done so already. Alternative Zero then rides the Psycoroader toward the opponent and rams into it.
Appearances: Ryuki Episodes 39-42
==Contract Monster==
*Psyco-Rogue
==Equipment==
*Card Deck - Transformation device and Advent Card holder
*V Buckle - Transformation belt
*Advent Cards - Trinkets that enable a Rider to summon Contract Monsters, access equipment, and use special abilities
*Slashvisor - Alternative Zero's Visor that enables him to use Advent Cards
==Vehicles==
*Psycoroader - Serves as Alternative Zero's motorcycle
==Rider Card==
: A Rider Card containing the power of Alternative Zero.
==Behind the Scenes==
===Portrayal===
Hideyuki Kagawa is portrayed by . As Alternative Zero, his suit actor was .
==Notes==
*Much like the 13 Mirror Riders, Kagawa also died an ironic death: His teachings about "sacrificing one life for ten" for the sake of heroism, even though he can't bring himself to do such a thing, leads to his betrayal and death at the hands of his own student.
==Appearances==
==See also==
===Footnotes===
==External Links==
*Kamen Rider Ryuuki Spoiler Page
==Navigation==
Category:Deceased
Category:Ryuki Riders
Category:Antiheroes
Category:Heisei Era Riders
Category:Ryuki Characters
Category:Card Riders
Category:Debatable Riders
Category:Antivillains
Category:Good turns evil
Category:Dark Riders