After learning about his true nature from Arima, and what it could potentially mean for the entire world,  Rokuro makes a decision.
Did you forget? Back then, 
you were completely helpless.
هل نسيت؟ كنتِ عاجزة تمامًا حينها
Hast du es schon vergessen?
¿Lo olvidaste?
Esa vez no pudiste hacer nada.
¿Lo has olvidado?
Esa vez no pudiste hacer nada.
Tu as la mémoire courte ?
L'hai scordato? L'ultima volta
eri completamente in sua balia.
Esqueceu? Naquela hora, 
você estava totalmente impotente.
Забыла? Тогда ты ничем не могла помочь.