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.
Why don't you change 
into the Celestial clothes?
Zieh dir doch einfach
die Stellargeistkleidung an.
Ponte la ropa
de los Espíritus Celestiales.
Por que não troca para roupas Celestiais?