Childe was in Fontaine, since he had business there as Heredaldo. Right now he was taking a break from his duties by the seashore, until he heard a song...

"Huh? Where does that melodious voice come from?"

Says Childe as he followed the sound of that melodious voice, taking him into the sea... And as he followed that voice, he could see a spectacular creature... A merman/mermaid...

"What....?"