I think that unlike Ishida's childhood "friends" and classmates, Ueno genuinely liked him and had a crush on him (that still continues to today). So when the Nishimaya bullying finally blew up in their (Ishida's) faces, she wasn't able to just forget about it and turn the bullying to Ishida. Obviously she wasn't brave enough to face the social risks and help Ishida, and instead she turns the blame to Nishimaya for "causing" all of this (though I think she admits in this last chapter that it was kind of their fault too for not understanding Nishimaya). By seeing the guy she liked tormented so much she was hurt by the situation as well, but has done an extremely poor job of dealing with it. Rather than trying to change herself like Ishida she's simply taking her anger out on Nishimaya in some vain hope that Ishida will go back to his old middle-school self..
Hopefully that comes off as somewhat clear. Basically I think the Nishimaya "incident" hurt her as well but she wasn't able to deal with it appropriately and is now suffering the consequences. If her reaction in the Ferris Wheel was any indication, I have to imagine her life isn't going too well either (I might be totally imagining things but I'm thinking back to how she was so timid and hidden when Ishida first ran into her again).
I might be thinking into this way more than I should but I find Ueno to be an extremely interesting character, much more than most characters in the manga I read haha
Sorry for not responding earlier, forgot I asked you about this lol. I personally thought the reason why she was hurt was because the bullying incident damaged her relationship with Ishida to the point that they weren't on speaking terms; I guess while there was still the threat of immediate social ostracism for hanging out with him (i.e., while they went to the same school), she kept her distance mostly, besides asking about his virginity like a creep. What I'm getting at is that she was hurt because she couldn't spend time with him freely anymore and because she knew he truly despised her after the scapegoat incident. I dunno, I don't see her as sympathetic to get hurt because he's hurt; I interpret her love to be more selfish than that. This could be a wrong assumption, because that doesn't really reconcile her behavior when she was hiding her identity from him at the cat club. My tentative explanation for that is that she was happy he didn't reject her invitation, which implied that they could maybe make peace with each other, but she was still expecting her confession to be rejected?
I also don't think she was entirely lashing out her hatred against Nishimiya. Sure, she hates her for taking away Ishida (in more ways than one), but she intended to get along with her at least for appearances' sake. What garnered the slap was Nishimiya saying she hated herself, and I think that was just out of frustration that Ishida was doting and wasting his time on a girl who had already given up on herself. There are probably better reasons than that though. Ueno's definitely interesting, but we haven't seen nearly everything from her yet. There's still a lot of stuff about her that isn't certain. Even her motives aren't free from doubt.
blah blah Iron Maiden forgot it's real name 29 or whatever chapter is the latest one
Relieved that he's going to go save Tsukiko. I'm not really a fan of netorare or whatever that trope is called. I guess her condition is tied to being a virgin? I would think that losing her virginity would cure the symptoms, but that doesn't explain why the stuco president was going to rat her out after raping her. Would they still want to study someone who couldn't generate the iron things anymore? I thought that an iron person was indistinguishable from a normal person unless they're manifesting the iron things.