The mysterious girl that showed up out of nowhere was actually Filo. She's a filolial queen with an advanced transformation ability, and she can even take human form thanks to it. However, her clothes get ripped every time she transforms, meaning Naofumi has to get her some magic clothes if he doesn't want to go broke. The party leaves on a new adventure to gather the materials required.
Hey! Didn't Naofumi-sama tell you 
not to talk with strangers around?
أنتِ! ألم يحذّركِ ناوفومي-ساما من الحديث
مع الغرباء؟
Na, Meister Naofumi hat dir doch aufgetragen,
nicht vor Menschen zu sprechen.
El amo Naofumi te dijo que no hables
cuando hay otros delante.
El amo Naofumi te dijo que no hablases
cuando hubiera otros delante.
Chut ! Naofumi t’a dit
de ne pas parler devant les gens !
Ehi! Il signor Naofumi ti aveva detto
di non parlare di fronte agli sconosciuti!
Ei! O Naofumi-sama disse que não pode
falar perto de outras pessoas, né?
Тише! Лорд Наофуми ведь предупреждал,
чтобы ты на людях молчала!