Soresu, I have no idea what to do about that arms dealer thing, especially if there's person of reference listed.
If you read past Miharu RP, Kotori isn't a mind reader (like Melisson is). What she can do is potentially pick up on encrypted telepathy. The people that were around the fighting on Amaya's Gate and when Eve boarded Miharu ought to have a good idea of that. Anyone external (like SAINT) so far only has suppositions of what she can perceive. Reika is going on the assumption that she needs to be careful with how she uses her telepathy, but Kotori's given her no reason to believe that she can eavesdrop... yet.
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On the idea of 'what needs to be discussed', here's some elaboration for transparency.
I know about as much about casinos and secret intelligence cells as the next guy. Which means... not a whole lot. I know I want a destination A, B, C and D (not necessarily in this number/order) but the rest is pretty vague.
So, I've pooled all of you together with the question "what do you think you'll face?". It allows me to do a few things. Firstly, it allows me to get more heads than just mine thinking about what they expect. Secondly, it allows me to foreshadow dangers that your characters will have prepared to meet because "hey, I'm a pro at this". And so forth.
You guys can keep going, or you can wrap this up generally satisfied with your preparations. There's no harm either way, but it might be more fulfilling to pitch in if your character has a skillset that should run more along those line of work (i.e.: SAINT) so that the character can get to shine more.
At least, that was the idea when I threw you guys into this. That's why Nyton isn't getting much in the way of answers to his net searches. I'm not going to make them for him; I'm expecting him to make them up for himself and shape the opposition he means to face. This second plot of mine is no longer about how talented or skilled the characters are - that's been established in the previous plot - anything that runs through their specialities ought to be feasibly done. This plot is more about how the team applies its talents and the judgment calls/moral decisions they take. Except for one exception: the rogue samurai introduced with this plot; the Kusariebi-no-kage (Shadow Vipers; not to be confused with the newer Black Viper plot). Those are meant to challenge the combat characters about as much as the top-tier opponents in the Miharu endgame could because they are that good.