The Flame Regalia originally belonged to Spitfire, but lost them during the fall of the first Sleeping Forest. They were given to other riders, eventually being regained by Spitfire. Before dying Spitfire passes the Regalia to Kazu, but the Regalia were later stolen by Aeon Clock. During the battle with Nike, Aeon tunes them to Kazu who then uses them to defeat Nike. After Nike was defeated, ending the fight on Genesis's carrier, Kazu gave the Flame Regalia Core to Ikki.