[justpassingby]

Spoiler for that incident:

I don't think the person she hurt is Tabane during that "incident". Well, it was not explicitly said who was it that she hurt, but I don't think she will hate Tabane if she hurt her. I was thinking more along the line of Ichika, or someone else, like the opponent she hurt during the kendo tournament.

In fact, the "incident" might refer to the kendo tournament where she hurt the opponent badly in the final that's mentioned in vol 3 after all

I was thinking she is much younger during the 'Incident'