
So recently i was reading a blog review about KR Ryuki and i had three interesting questions.
First why did Kanzaki chose Ren and Shinji to gave them the Survive Cards? (aside from the out-universe explanation that they're the main riders and need to be the riders to get the final form) why not Ouja? Tiger or even Zolda? These guys would've accelerated his plan, as for ouja he already killed 4 riders during the show and always trying to kill the riders, or Tiger who didn't care for his allies and killed them, Zolda will probably forget his friendship with Ren and Shinji as soon as he gets the Card and becomes close to his wish, is Shiro a fool?.
Also Why did Shiro chose some guys that clearly didn't match his preferences or his criteria, i mean didn't had some great wish that'll motivate them to fight in the War, especially Sano, Why you didn't chose a guy like Scissors or Ouja or just a homeless man and convince him if he wins he will has the most luxurious life ever?
Moreover, Shiro had some sort of control over the Mirror World so why he didn't try to band the Alternatives from entering the Mirror world, i mean Shinji still a rider who kills monster in that world so at least he somehow valuable for Shiro, but Kagawa and Hajime were just there to close the world, consequently they could've made his plan fails, so why you let them enter the mirror world?