To Aru Majutsu no Index II – 21
「学習装置(テスタメント)」 (Gakushuu Souchi (Tesutamento))
“Learning Device (Testament)”
She doesn’t have a single line to her name in this entire sequel, but Hyouka makes a return in the big way due to Aleister’s blasphemous act of turning her into an artificial angel to deal with religious fanatics (i.e. Vento).