Bukimi-chan is a variation of the Hanako urban legend. Once someone finishes their business on the toilet she will ask them if they want red, blue, or white paper. Their answer will determine what color paper they are given.
Following the defeat of Hanako in Seven Sisters High School and the events of the Kasugayama High School Bomb Shelter, Hanako, the girl mistaken for the similarly-named demon in Seven Sisters, will appear at Kameya Alley's Satomi Tadashi pharmacy, explaining she was over at Kasugayama, seeking the truth about the blessed emblems, and was again asked her name by a student and mistaken for the mythical Bukimi, this, ironically, after deciding not to call herself Akemi after the rush she provoked in Seven Sisters. The student believing himself to have met Bukimi will be at Kasugayama's third floor, whence he will provide the necessary idea for the rumor about Bukimi to be spread. Once this has been done at the Kuzunoha Detective Agency, Bukimi will stalk the halls of Kasugayama. Defeating Bukimi grants the party its nametag, which can be traded for Soma x5.