When Marisa had made it down to the Great Waterfall, things were already in action. And by action, I mean something Maullar would like, because it seems Sanae had taken Aya hostage by tying her up and was interrogating her.
"So, you mean to say you have no idea why Reimu is missing. And you're sure about this, right? Because you know, if you aren't telling the truth, there's this little dog I have tied up in the back room, and I'm not afraid to take her away from you." Sanae was letting the main character-ness get to her head and was trying to imitate Reimu's badassery.
"B-B-But, please don't... please don't hurt Momiji.... *hic* *sob* I swear, the two of us *hic* never saw anything... She can even see when Reimu is changing... there's... no way *sob* that Momiji would possibly have missed *hic* anything and she didn't *sob* see it..." Aya was actually crying. Apparently, she cared for Momiji more than Sanae expected, and though Sanae kept a hard face, Marisa came to Aya's aid.
"Sanae~n, don't worry about it, ze~ If Aya is that depressed about it, there's no way she's lying, ze~ Just give her back Momiji, and let's go talk to some other Youkai, okay, ze~" ze~'d Marisa. Sanae looked at her for a second, and decided that she had pushed the interrogation too far.
"Fine, fine. Aya, I swear, if you're lying, I will beat the everliving shit out of you like Kanako has asked me to fifty times already. But if you're telling the truth, you and your youkai dog can have all the fun you want. After all, you seemed pretty honest about spying on REIMU INSTEAD OF ME (tee hee) but I guess that just means you're honest. You pass today." Sanae sighed a little and walked off, with the corner of her mouth twitching.
Marisa went and untied Momiji for Aya, since Sanae forgot, and chatted with Aya for a bit, while Sanae flew outside beating up fairies.
"Yeah, she got this odd idea that she's the main character now, ze~"
"Ayayaya, what a pain... there's a reason that girl will never actually be the main character... She's just kind of psycho. I think it comes with the green hair. I mean, Yuka is batshit insane, Sanae is batshit insane, and I think Wriggle just might be, I mean, she never does anything about those shota jokes, after all."
"Green is an evil color, ze~"
Marisa walked off, pet Momiji a little, and then stopped Sanae from killing some fairies and the two flew down more to go talk to the kappa.