Sachiko had to wonder about this set up they had here. Though she supposed it made a little sense, given this was clearly their base of operations, it seemed weird that they had all these amenities around. They had brought furniture in here for them to use and everything. Was it really necessary for them to hang out here, rather than meet somewhere else before going in? Maybe they just liked the idea of hanging out in old, abandoned buildings. After hearing Kazuki mention something about them 'earning their place here', Sachiko couldn't help but find that a little arrogant. They had asked for them to come, not the other way around. They had helped them out and were offering more assistance now, but it just seemed off for him to tell them they had to 'earn' a place in the group. But Sachiko decided not to complain for now, since either way, she was going into the mirror world right now.
When they were prompted to take a weapon from the table, Sachiko had to take a moment to look through the weapons. She had never used a weapon before in her life, so it's not as though she could pick one she was familiar with. She spied a pair of scissors, partially concealed beneath a few other weapons. Who would use scissors to fight? They probably just put that there by accident. Ignoring the scissors, she chanced on something a little more familiar. Her ballet group had performed some Chinese productions, and at least one of them had made use of a type of broadsword. It was just a prop when she had used it in ballet, but at least she could claim some familiarity with it. Any of these weapons would require getting used to, so she might as well pick something that had some small meaning to her. So the Chinese broadsword it was.
It occurred to her that there was one thing that was dwelling on her mind about the mirror world. "Are those tongue monsters the only creatures we'll encounter down there? Or are there bigger, badder creatures in that world?" She had a feeling it would be as she described it, but it couldn't hurt to ask. Hopefully, these two would actually describe some of the things they might encounter down there as part of their answer.