Blade Dance of Elementalers S00 E01 Imperial City Spirit Festival

This takes place four years before the main events. Kamito is assigned a mission from the Instructional School: steal two militarized Demon King / powerful spirits from the imperial capital during the Great Festival of the Spirits. At the festival, there is a grand procession with a portable shrine carrying the Princess Maiden of Flame. The shrine is guarded at its four corners by militarized spirits, two of which are what Kamito has to target. In the end, he only retrieves one of the two, because the Princess Maiden of Flame (Rubia) manages to intervene.