We began exploring each app on her phone. Fortunately, her phone didn't have a lot of applications installed. We reviewed her Instagram, YouTube, Google, and a calculator, but nothing seemed out of the ordinary.
We looked through her photo album, and there weren't many images. The majority of the 107 photos were of culinary recipes, meals, Sayuri and Yuka, her dogs, and their relatives.
We then looked through her Google, Instagram, and YouTube accounts but found nothing noteworthy. And her phone appears to be clean. There were no new hints.
"I guess we should look elsewhere," I remarked.
"You haven't yet checked the calculator."
"It's nothing more than a calculator app; there's nothing wrong with it."
"Oh, something's wrong with that, all right; why would she download another calculator app when her phone already has one?"