Myranda surprised by the Queen's conclusion tries to explain: "What? No, Unburnt One, all Ghashyr are hurt by fire! The explanation is far simpler; the Enflamed Enthronement is performed while the emperor-to-be wears the imperial arsazezyn armour, which protects parts of him, or her, from burning, in the meanwhile it is customary to drink a secret potion that makes ones' skin more moisty than usual while it raises body temperature. Nevertheless there have been Emperors that had to try more than once in order to pass the ritual, since moving even in the slightest while one sits on the throne is quite painful and it demands great will and self-containment to remain perfectly still while clad in heavy Arsaz armour.   ...It short of symbolises the calmness, willpower and personal sacrifices an Emperor would make for the good of the empire. I'm sorry if I'm being too curious your greatness, but do you Formics have rituals as well?"

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(Kilysa's actions reveal that the firestorms of Remelax all move parallel to each other and change course only when a new firestorm errupts, surely this is not natural.
Furthermore it seems that firestorms are affected by the presence of electrical signals/pulses that come from living beings and especially that of the Ghashyr; You notice heavier firestorm activity close to your landing point. When a firestorm vanishes, another one immediately takes its place in some random location. You can now follow firestorms for a while and pay closer attention to them, if you find how you can attract them.. hint for later: "A beginning is a very delicate time".)

(Non-usable info: I'll RP in behalf of the Firestorms. I'll describe what effect each action of yours has on them, ie; the harvesters did absorb the radiation, but upon the firestorm's vanishing another took its place.)