Wait, waterfall? [Huh, kind of sounds like one of Chie's kung-fu films. She's about to ask what, exactly, they'll be using the waterfall for, when she remembers that Mitsuru's not going to explain the training til she gets there.]

...nevermind. So, clothes, swimsuit, and nothing that can't handle a little water. Got it. Just tell me when you want me there, and I'll get packing.