The town of Ermina turns out to be a city for fish, where the whole town is submerged in water during high tide. The moment the party mentions Water God Dragon, the fish turn hostile.
Then why do you look like 
people during the day?
Wieso gibst du dich
tagsüber als Mensch aus?
¿Y por qué de día se vuelven humanos?
Então por que vocês parecem
pessoas durante o dia?