Secret - S1.E29

Ra Kan and Kotona near Kotona's home, Ironrock, a supposedly cursed city. They are captured by the Makiri, guardians of Ironrock, led by Kotona's sister, Rina. Kotona reminisces about her childhood and how she came to possess her Zoid, Rainbow Jerk. The Makiri turn their captives over to Digald, but they escape with Kurukku's help and discover Digald's Zoid factory. They are hunted down again by Digald, and Rina takes a bullet in order to save Kotona. Ra Kan and Kotona escape from Bio-Ptera using the new powered up abilities of their Zoids.