As Rex Genome, they gain enhanced leg and tail strength respectively.
Moreover, Vice has a habit of.
We can see his family as his biggest priority, and the fact that his mom has to tell him that he can live for himself sows seeds for his future character arc.
During Ikki and Vice's first transformation into Kamen Rider Revice, Wakabayashi was murdered by the Chameleon Deadman, who later assumes his identity.
Years prior to the series, he worked with Vail to murder Genta's parents and use him in Noah's experiments.
The events of the film take place between episodes 14 and 15 of the series.