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.
I'm the one graciously working with 
you lot until the Waves are gone.
أنا من يعمل بسخاءٍ معكم حتّى زوال الموجات
C’est moi qui vous fais l’honneur
de coopérer !
Guarda che sono io che collaboro con voi.
Eu que estou ajudando de boa
vontade até acabarem as Ondas.
Вообще-то, это я вам помогаю!