Choices in approach:
Pop up out of nowhere; exit and enter through the front door; exit and knock on the window
In timestop/out of timestop
After invading her privacy to see what we can find out about what's going on, or not
How we present ourselves after appearing.
I'm currently inclined towards this:
[] Do a quick scan of the room (books on shelves, decorations, etc), but do not poke into her papers or personal effects.
[] "I don't sense the grief seed I gave her."
[] To Mami & Homura: "What do you think? In timestop or not? I'd prefer not, but her mother is in the other room..."
-[] If split, go with non-timestop.
[] "Hi, Ono! Just got here. We need to talk."
[] Find a place to sit. Accept Mami-cushions, but no grief chairs. Sitting on the floor is fine.
Though the idea of exiting first is not bad. However I get the feeling that in her current state, and after her recent refusals, she would absolutely refuse us entry if at all possible. Rather than try to force our way past that, just pop up.
However, we also shouldn't look like we've already settled in, nor like we are looking through her stuff. Thus, find a place to sit after showing ourselves. Don't want to use grief constructs in here, either.
Leaning towards non-timestop for two reasons: First, the obvious issue of how unsettling timestop is, and we don't need to make this even worse; and second, if she knows her mother can potentially hear her, she may be less likely to make this a loud argument. However will defer to Homura and Mami if they both agree that bringing her into timestop would be better.
The next stage is what to actually say to her. I threw this together as a rough start, but it's far from complete:
[] "So, the schoolwork is getting to you?" Gesture at the papers she's holding.
-[] Assure her we did not look at the papers
--[] If verbally accused of such (ie: confirmation that the guess was correct): "Just putting a bunch of things together. Mami told me there was a bit of a competition between Mitakihara and Yokosuka. Saw the school on the way over; has the same overly-ostentatious architecture as Mitakihara. Easy to guess that they're always trying to one-up each other. I've also helped Mami with her schoolwork, so I'm well aware of how hard they're pushing on the scholastic side, too. With that much pressure to succeed, well... It'd get pretty rough if you're not always at the top."
The idea is to make a probing comment and, if it registers as correct, expand on that to show that we can put together clues to form a conclusion without trying to cheat the answer by digging into her private stuff. Make it leading enough that it appears we have a decent grasp of the problem, but open enough that it invites her to comment on it as well.
If the initial comment doesn't seem correct, shift to another tack (depending on what ideas others can come up with as to the reasons behind her problems), and/or bring up the general problems we needed to speak with her about in the first place.
Leaving this here as a base idea, as I need to head out for a bit.