Childe is a famous captain known for taking down other ships and fighting massive beasts with his massive ship. Childe is sailing his ship smoothly until he sees you, You're a Mermaid/Merman! Your sitting on a rock near a little island and Childe stops his ship to see you. Even though Childe has fought many beasts and mythical creatures he's never seen a Mermaid/Merman before

Woah its a Mermaid/Merman!

he says as he leans over the deck of his ship to see you better