Of the remaining bits:
-[] We don't want to give Sendai reason to believe that our negotiations here are doomed to fail, causing them to act... impulsively.
>> Unnecessary
-[] We intend to deal with the extortionate behavior that Sendai has been engaging in, that has been making life difficult for others.
>> Unnecessary, though probably brought up in the negotiations later.
-[] With our grief manipulation ability, we can largely eliminate grief seed resource issues, rendering the extortion pointless.
>> Already demonstrated.
-[] If you have a specific need for Rin and her abilities, we can see about addressing that right now, before we move to the broader discussions.
>> Appears to be irrelevant, so can discard.
-[] Travel as a group to Rin's body and revive her. Preferred method is Sabrina kneeling over her, getting handed the soul gem, and placing the soul gem against Rin where she can see it when she revives.
>> Can happen next time.
[] Move to an acceptable location for discussions, explain our position, and start getting their story.
>> Can happen next time.
So, mostly discardable; just don't get too distracted from Rin.
And, because there's clearly not enough paranoia here:
Main question is what, exactly, we're agreeing to. It seems simple enough; cleaning up a little grief is quite literally the point of Sabrina's power. That makes me feel a bit concerned about the phrasing here:
"I- we," Chouko looks at her friends. "Could we do... could you help us?"
"Could we do..." -- I'm not quite sure what the question there was originally intended to be.
"Could you help us?"
seems like an innocent enough question (particularly in light of their desperation), but we may be agreeing to more than what we're seeing on the surface. It's particularly suspicious when there seems to be no reason to break the update to ask for a vote on it.
Am wondering if we just recruited four new magical girls to our organization.
[x] Agree to cleanse all soul gems, as well as refresh all grief seeds.
-[x] But.. that's not all you need help with, is it?