so 22 days(02 October-23 October) before Eiji Kyouka already met with her father and forced him to meet with Hatanaka, as she is related to Sai Yashiro... one thing shoyld be clear: Kyouka maybe prefer B-1 than Eiji, sine B-1 cooperated first with Shouto...
Most likely the reason why Kyouka wanted Sai Yashiro defeated is that he copied LL... and is nothing compared to LL.