I don't think we should probe--
This basically. Let's assume she knows witch and lichbombs and if she doesn't, then I am thinking that she should learn them.
I do think we need to open with answering her question, as I always do --
[X] Explain your belief that you are a product of a wish. Omit any suspicion of whose wish in particular -- multiple timelines, Madokami, and Madoka's potential should all remain tightly suppressed.
-[X] Give evidence: no history, sudden appearance, strange knowledge. Omit any mention of personal knowledge (Mami, Homura, etc) but note both general knowledge & specifics of Puella Magi system.
[X] After whatever immediate questions she has...
-[X] Drop a summary of current problems on her.
--[X] Kyubey is eventually going to try to get us killed.
--[X] There's at least one malignant weirdness around, you don't know much about it except that it's tried to kill at least one person and is screwing with some magics. (Feathers)
--[X] One of our allies is rejecting her wish and her soul is all kinds of fucked up.
--[X] Walpurgisnacht arrives Apr. 30, because why not. Arguably the least of our problems, it's "just" a witch.
[X] You don't know a ton about her, but as long as she's not interested in mass murder you're more than happy to offer her almost whatever she wants in exchange for contribution.
-[X] You have a system to break, after all.
...
Maybe some changes to that last bit, but eh~
And when I say this, what I mean is, "assume Riona knows witch/lich, assume she had a good reason to come here, assume that reason is tied up with Magical Girl stuff because
duh, answer her questions without breaking infosec on the critical stuff, summarize what's going on, then ask what she wants."
Update, because this works:
[X] She knows where witches come from and that the soul gem is the soul, yes?
[X] Explain your belief that you are a product of a wish. Omit any suspicion of
whose wish in particular -- multiple timelines, Madokami, and Madoka's potential should all remain tightly suppressed.
-[X] Give evidence: no history, sudden appearance, strange knowledge. Omit any mention of
personal knowledge (Mami, Homura, etc) but note both general knowledge & specifics of Puella Magi system.
[X] After whatever immediate questions she has...
-[X] Drop a summary of current problems on her.
--[X] Kyubey is eventually going to try to get us killed.
--[X] There's at least one malignant weirdness around, you don't know much about it except that it's tried to kill at least one person and is screwing with some magics. (Feathers)
--[X] One of our allies is rejecting her wish and her soul is all kinds of fucked up.
--[X] Walpurgisnacht arrives Apr. 30, because why not. Arguably the least of our problems, it's "just" a witch.
[X] You don't know a ton about her, but as long as she's not interested in mass murder you're more than happy to offer her almost whatever she wants in exchange for contribution.
-[X] You have a system to break, after all.