Responses

Best of all: he knows that he's not infallible. He didn't put himself on a moral high ground. He talked to her person to person. Tried to understand her from his viewpoint the best he could and was just honest with her. That, that is an amazing teacher right there. Not only supporting his students, but trying to be better when it really counts and admitting his wrongs.
And the fact she's willing to take a step forward shows that she's a good person too, just misguided and blinded by trauma.
DAMN this character writing is SO GOOD
He went about it in such a way that doesn't let Toki sensei get defensive to attack. He admitted that there is in fact a problem that needs to be fixed while acknowledging Toki sensei's side of things. Toki sensei said she expexts a full out war so Tsuka chan coming from an understanding perspective threw her off enough that she became more receptive to what he is saying. I love how this problem is getting worked out by the author