Kadinaru Shinku

''Kadinaru Shinku (カーディナル真紅 Shinku Kadinaru) is one of the Cures in Rainbow Power PreCure!. Her alter ego is Cure Ruby (キュアルビー Kyua Rubī) and represents crimson flowers and jewels. ''

Trivia

 * Shinku's name means " Crimson Cardinal". 
 * She is the first princess mentioned in the franchise. 
 * Shinku is the first red Pretty Cure in the franchise.