"What do you mean by 'not very familiar'?"
Bai Xiaodie said, "Various indications show that, besides the eight of us, there definitely exists another personality, but she has never interacted with us, which is why I know nothing about her."
Long Wu wrote an "X" in her notes and looked up to ask, "Then how can you be sure that there is only one hidden personality? What if there are two, three, or even seven or eight?"
"I judge based on the frequency of appearance. Given her frequency, it seems to be about the same as the average number for the other eight, so I believe there should only be one."
"Can you determine their gender?" Long Wu asked.
"It should be female, I haven't noticed any masculine traits in myself." What Long Wu referred to were smoking, wearing men's clothing, chasing women; over the years, she had not accrued any emotional debts with women.