I love Ruri, she's trying hard to figure things out and the mother is trying to be as considerate as possible, however I think the rest aren't making sense, she obviously doesn't want to be the center of attention of the whole school, nobody would want that, specially people freaking out and feeling animosity just because you're simply existing.
Kashiro is almost presented as "I don't give a fuck about how you feel or how others feel about you, I want to hang out with you and the others so come on, it's gonna be fun!" that's half good and half selfish and inconsiderate and if that wasn't enough, she ends with "If you don't come up, everyone will feel guilty so you better join us!" huh? WHAT ABOUT NOT CARING ABOUT WHAT THE OTHERS THINK? NOW SHE HAS TO BE CONSIDERATE?
Aaaahh I need to breath, seriously it pisses me off when I try to make sense of all of this because some characters act normally like Aoki despite her situations but others are being selfish, too carefree or then aggressive.