Odin appeared briefly in many episodes, his debut revealed him using the Time Vent card and had time reversed. Shinji was then the only person who appeared to feel the effect of the time change, and tried to alter the course of time which happened. Unfortunately Shiro told him that that cannot happen as the course of time altered in the past would direly affect the future (which obviously would affect the Rider War and its outcomes). The first Odin was a homeless man whom Kanzaki handed the Card Deck to. This Odin was destroyed by Kamen Rider Knight Survive. The second Odin was destroyed by the combined efforts of Ryuki and Knight.
The third and last Odin fought Kamen Rider Knight Survive after Shinji's death. This Odin was destroyed by Kanzaki himself (when Kanzaki realized the pointlessness of the Rider War) before he could use his Final Vent on Kamen Rider Knight Survive. Before fading away, he declared Ren the Final Rider. Kamen Rider Odin made an appearance in the 13 Riders special amongst the Kamen Riders against Kamen Rider Ryuki and Kamen Rider Knight. After Kamen Rider Ryuki was knocked to ground, Kamen Rider Odin grabbed his Card Deck and destroyed it.