I got my friend,
_debbiechan_'s permission to link this here, but she has written a story which I think really is fabulous in its characterization of Tatsuki. Its never really explained in the manga what exactly happened with the girls who picked on Orihime or how Tatsuki was treated in middle school, but I think Deb might have got it right.
I Don't Like Girls by debbiechan Leave her a review, yeah?