[x] Apologize to Madoka for the way you phrased that.
[x] Impress upon Madoka and Bennouna:
-[x] That Walpurgisnacht Bennouna mentioned is effectively a small natural disaster.
-[x] Walpy is fucking dead. The people are going to be safe and the city will be too.
-[x] This is mostly social-fu: filter out girls that're insufficiently idealistic, build community among the girls that do come. Killing Walpy faster is two birds with one stone.
-[x] If Madoka shows any sign of considering contracting, shut it down. It wouldn't help in this situation, and even if it did, it wouldn't be worth it.
[X] Remain casual.
[X] Uh. You did not mean to deliver that to her that way. Sorry, Madoka.
-[X] City-destroying, potentially, life-threatening, no. The city will be evacuated on the civilian end, and, well...
--[X] We hold back. A lot. Explain the mecha that we made with Mami the one time, including -- emphasizing -- the ease with which it allowed us to crush that barrier. Frame and describe it as something we did at least semi-seriously rather than describing the giggle-fest that was going on at the time. That was just Mami and us cutting loose just a bit for just a little while.
-[X] More girls would help limit the property damage, though, which could be considerable, and... You quite like Mitakihara intact.
-[X] But we're also interested because the kind of person who would help with something like this is the kind of person we most want to support.
[X] Be apologectic for letting Madoka find about it this way, but reassuring that we've got things under control.
[X] Yes. It's called Walpurgisnacht, and it's on the scale of a natural disaster.
-[X] Between the abilities our group has, we can probably kill it without many issues - we've got us providing infinite magic, Mami Tomoe, and Homura as a major force multiplier. And we've got high hopes for Sayaka.
-[X] The problem would be the collateral damage. With our Grief powers, we could kill Walpurgisnacht alone, but the damage to the city would be considerable.
-[X] Homura's taken care that the city will be evacuated before the fight, but you want Mitakihara intact. If possible, you want to kill Walpurgis before it even gets here. That means we need more help, and... the kind of magical girls that would turn up for this? Those are the kind of people we want to support the most.
[x] Explain about Oriko's predictions that we would defeat Walpurgisnacht, but note that she did not specify exactly how that victory would occur nor that it would be without collateral damage to the city. So we want to weight the odds in our favor as much as possible.
[x] Explain what we know about Walpurgisnacht and ask if Nadia knows any more.