Himekawa is a guilt-stricken by her failure to protect the citizens as they boarded the Tokyo megafloat.  When a mysterious radio signal is picked up by Atraxia, she leaps at the change to perhaps finally save a civilian.  But when Amaterasu arrives at the source of the signal, they find an enemy from another world, and one deeply connected to Himekawa's past.
So that's what you call 
the Magitech armor, huh?
So nennt ihr also Ketzerrüstungen.
¿Así llaman a las Armaduras Mágicas?
¿Así llamáis a las Armaduras Mágicas?
Ah oui, c’est votre terme
pour les armures maléfiques !
Quindi è così che
 chiamate l'Armatura Magitech?
Então é isso que chamam
 de Armadura Magitech?