[X] Not a lie. There's thing you want in exchange for your help after her problem is solved.
-[X] And yes, you'll stop her from killing anybody in the meanwhile.
-[X] But hold that thought... [X] She looks like she's got something to say?
-[X] Encourage her to talk. Dig at her reasons and expectations.
-[X] Try to stop her if this turns unproductive.
[X] Insist that you can help. Helping people in difficult situations, like her, is what you were made for.
-[X] Help for real, none of that soul taking bullshit.
-[X] Ask her to take a few minutes to actuallyconsider it.
[X] What you'd ask of her:
-[X] To help a friend of us (Wish rejection).
-[X] To help you with a secret project, if she agrees to keep it secret.
-[X] To stop killing people and release the souls unwillingly taken.
--[X] Honestly, wouldn't she want to stop? -[X] If agreed on the secrecy point, reveal de-Witching plans.
[x] I do want you to stop. But if I refused to help any magical girl who was pushed by circumstance to do something awful... there wouldn't be very many girls that I could help left.
-[x] If I manage to help you, if the things you treasure are safe, and if what you've done is no longer necessary afterwards... won't you want to stop, yourself?
[x] My whole goal is to help people. And if that's not something you trust, then trust that I'm working on some really tricky problems -like dewitching- and would appreciate some assistance.
[X] She doesn't get it, does she?
-[X] You don't need preconditions. You'll help her, because you'll make the world a slightly better place by doing so. And because you'll be able to get her to agree to things afterwards.
--[X] When people have something they'd watch the world burn before endangering, you don't open negotiations by demanding they endanger it. You open negotiations by ensuring its safety.
[X] It isn't a lie. You want Riona to stop but you can settle for postconditions.
[X] But what is Riona's problem she keeps in Edinburgh anyway? Somthing to cleanse from grief? You're working on cleansing enchantments and can refresh Grief Seeds indefinitely. Dewitching? You've been working on that and gotten some results
-[x] If Riona shows interest or challenge us to our claim, bring the Clear Seed again and let her examine it. Explain technical differences between Grief Seeds and Clear Seeds (clear seeds feel calmer, etc). After that, insist on the question about what's in Edinburgh.
[X] Yes, you despise it. Your offer is not a lie, though.
[X] You simply believe that she has a reason for this.
-[X] And that if her problem is solved, she won't have that reason anymore. She'll stop.
[X] Are you wrong?
[X] Sabrina helps everyone, even witches. De-witching research happening. We don't send them to Kyuubey already. Rionna isn't worse than a witch? We will help her.
[X] Before Rionna decides her end, explore the truth we are saying. Proof exists.
[X] Rionna must have used countless powers already. Another Shade can't help her.
-[X] What she needs is someone to cast the magic along with her, isn't it?
[X] The only way to move forward when one has done everything they could do is to do things differently than ever before. Sabrina is the person who acts in the way that won't hurt Rionna. Who else has helped with her problem?
[X] People don't do horrible things without reason. Force is almost always less effective than addressing the underlying problem, answering the reason..
[X] Anri is our example of morality, tell the story