When Sigil says "SHUT UP!!" when fighting Hikaru, the background behind them is the school, but when Hikaru cries "No, that's not like you! You're not the Sigil I know at all!", the background has changed to the city.
In the English dub Hikaru and Haruna pronounce "manga" differently; Hikaru incorrectly pronounces it as "MAN-ga" while Haruna pronounces it correctly as "m-AHN-ga."