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.
It was obvious since you had 
no weapons, only a shield.
كان ذلك واضحاً بما أنّك لا تحمل
سوى تِرس
Das ist offensichtlich, weil du nur
einen Schild und keine Waffen hast.
Lo supe en cuanto vi
que no llevabas más armas.
Lo supe en cuanto vi
que no llevabas más armas.
Je l’ai tout de suite su,
comme t’as qu’un bouclier.
Basta uno sguardo per capirlo,
dato che non hai altre armi a parte quello.
Deu pra sacar porque você
não carrega nenhuma arma.
Я как увидел, что у тебя щит один,
сразу просёк!