A mysterious woman showed up out of nowhere and destroyed the second Soul Eater in a single blow. She then proclaimed the start of the "true battle of the wave" and blew away the other three heroes when they attacked her. With Naofumi's party proving ineffective as well, he decided to use the Rage Shield one more time.
It is your duty to reveal 
the secret behind it.
من واجبِك الكشف عن السرِّ وراء ذلك
Du musst Uns dieses Geheimnis verraten.
Tu obligación es contarme el secreto.
Tu obligación es contarme el secreto.
Tu as l’obligation
de me révéler ton secret.
Ti ordino di rivelare il tuo segreto.
É seu dever revelar o
segredo por trás disso.
И ты обязан раскрыть свой секрет.