Usopp finally snapped out of the little trance, shifting back at Scourge's threat and the undine's sulk and sharp gesture. He glanced between the two for a moment before focusing back on the undine, tightening the grip on the long, fairly useless slingshot he hadn't seen fit to stop carrying. "Okay, who are you, and what do you want?!"

Women who floated around in ponds singing and not talking just couldn't be good news. While Usopp had learned fishmen and mermaids and similar beings could be perfectly intelligent, nice people, he'd also learned they were like humans and could also be complete jerks, and wasn't about to get in the water with somebody acting suspicious.

"And why is a pirate facing a problem like this when he's trapped inland?!" Usopp added with a touch of indignation. It was going to be hard to fit this narrative in when he retold the daring tale. Maybe he could lie and say he met her on the ocean. He'd have to leave out the whole 'mesmerized' bit. That was just embarrassing. Luffy was the one who always got brainwashed, not Usopp.