[X] "What now" is largely up to her.
-[X] Relate your metaknowledge about Kyouko. Avoid directly bringing up painful memories, but make it clear that you know about them.
--[X] Explain how your knowledge covered events-that-could-have-been if you didn't exist.
--[X] This is a part of why you're having Kyouko train Sayaka - they could have been enemies or friends, and not much in between. (stress that this is a probability rather than "I see all futures!")
--[X] Everything you know about Yuma boils down to her being better off with Kyouko, even if that means being a magical girl. Elaborate as best you can if asked.
-[X] Between what you know about people, and the resources at your disposal, it is a fact that there is a lot you could -- and would -- do for her. What you know has been very accurate so far, and there are could-have-beens where she is-was-would-be happier than she is now. But at the moment, you've basically reached the limit of what you can do for her without her really wanting it.
--[X] Let Kyouko respond to that.
--[X] Clarifications, if applicable/necessary/seem like a good idea: what you're already doing you're going to keep doing no matter what; all of this is entirely up to her with the exception that we aren't going to just stop coming around even if she asks.
[X] Relate your metaknowledge about them. Avoid directly bringing up painful memories, but make it clear that you know about them.
[X] Explain how your knowledge covered events-that-could-have-been if you didn't exist.
-[X] This is a part of why you're having Kyouko train Sayaka - they could have been enemies or friends, and you'd really rather not have Kyouko as an enemy. Too skilled and mean by half.
[X] Which leads to what now: your continuing goal is to make sure your friends are safer, stronger, and happier, come what may.
[X] Relate your metaknowledge about them. Avoid directly bringing up painful memories, but make it clear that you know about them.
[X] Explain how your knowledge covered events-that-could-have-been if you didn't exist. -[X] Some of it is other's secrets, some of it is tragic, some could cause tragedy, but they deserve to know it exists, even if you have to avoid or talk around some stuff.
-[X] This is a part of why you're having Kyouko train Sayaka - they could have been enemies or close friends --- or both, in that order --- and you wanted to provide an opportunity and a place for them to meet on good terms.
-[X] Everything you know about Yuma boils down to her being better off with Kyouko, even if that means being a magical girl. Elaborate as best you can if asked.
[X] Which leads to what now: your continuing goal is to make sure your friends are safer, stronger, and happier, come what may.
-[X] You'll admit you don't have a clear picture of specifics though. Unless Kyouko has thoughts?
-[X] At the least, you think you've reached the limit of what you can do for Kyouko without coming to an agreement or a discussion.
