Ren Akiyama/World of If

is one of the participants of the Rider Fight known as . Following Eri Ogawa's death, Ren was manipulated to become Shiro Kanzaki's puppet and became .
==History==
===World of If===
After Eri Ogawa died in the hospital, Ren himself quits being a Kamen Rider while throwing away Knight's Advent Deck. While wandering, Shiro Kanzaki appears and give him an Advent Deck, turning him into Odin's puppet. Ouja, as the final Rider, later stands before Odin, going into battle. During the battle, Alternative Zero jumps in and join forces with Ouja to fight Odin. Ouja activates his Final Vent, but before it hits the latter, Odin activates his Time Vent and vanishes, then reappears on Venoviper's seat strikes Ouja quickly.
Right before he dies, Asakura sees Odin's face through the hole in his helmet melted through by Venoviper's poison, revealing Ren. The mask completely crumbles away and Ren comes back to his senses. He looks down at his body and after realizing what happened, Ren calls for Shiro Kanzaki as the latter appears, laughing in glee. Now that Odin is the victor of the Rider Battle, Shiro can finally grant Yui a new life. Ren notices something peculiar about Alternative Zero as he heads over and yanks out the deck, revealing Yui. She revealed that she borrowed the deck from Kagawa to stop Shiro, and reaches out to him. But as Shiro has no body, and can't grasp her hand, Yui dies as he failed to grant her a new life, later mourning her death.
==Forms==
==Contract Monster==
==Equipment==
*Advent 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
*Darkvisor - Knight's Visor that enables him to use Advent Cards
**Darkvisorzwei - Upgraded version of the Darkvisor used to transform into Knight Survive
===Vehicles===
*Rideshooter - Motorcycle used by any Rider to enter the Mirror World
==See also==
*Ren Akiyama
==Appearances==
* World of If
==Navigation==
Category:Ryuki Riders
Category:Ryuki Characters
Category:S.I.C. Hero Saga Riders
Category:Heroes
Category:Card Riders
Category:Good turns evil
Category:Villains
Category:Heisei Era Riders