All they had to do is to say nothing. No one was forcing them to shit on her. Kotoka acted like the most braindead JP corposlave. "My company thinks she is bad so I must publicly renounce her, regardless if I agree with it or not". Even if she supposedly cried during the membership stream, what she presented to a public was a massive bitch. The only reason I can sort of give her the benefit of the doubt is because she is japanese, so it is default behavior she would feel forced to adopt.
Just the simple fact, that the only person who said nothing negative about her wasn't even her genmate speaks volumes.