He has an iron will cause he already went through someone using blackmail to get him arrested once, duh.
That aside, her goal seems to be, as expected, to "help" takamine by removing him. Usually id say here how she could simply talk to her presumed idol to remove the misunderstanding, but in this particular manga, thatd only make it worse. With how takamine talks about shirota for a majority of the time, theres a high chance that she overheard them and that the reason shes doing this in the first place.
Obv "please refrain from bothering me any further" is a bluff by our resident mega tsundere, shed never allow anyone else to blackmail him and get away with it, but i do grow tired of her act at this point.
Thanks for the chapter.