Reading it a second time feels weak. A beautiful girl being so meek and basically a doormat for lame bullies is basically unbelievable to me, either I was lucky and was in good schools/classes, or Japan is just different.
Had like 3 different twins siblings in my classes, few others in other classes - they would often do all they can to seem different so that people can recognize them, but they never were so mentally different as this girl and her twin sister being basically completely opposite. One exception was different egg twins - boy and girl - they kinda grew in different groups cause of gender so they were different, but all the same sex ones were kinda the same thing just dressed differently if you will - at least part the days they wanted to make fun and pretend to be each other by switching clothing/style.