Ritsuka actually doesn't mind talking about it, as it happens, it's just very literally a long story. Even explaining some of the basics to Waver, who's already familiar with the underlying principles, had taken a while. And right now, they have other things to do!

Like ask a local about the fish-bikes.

"Oh, I see them!" Don't mind as Ritsuka just hurries on ahead to flag down the passing Atlantean. "Excuse me! Do you have a moment?"

For that matter, she's getting straight to the point. Either she's quite the extrovert, or she's used to asking random people about odd things...