Just as it looked like the site readers accepted Kotoko’s solution, it ends up getting shot down. However, Kotoko had another solution ready. In order to defeat Steel Lady Nanase, she unleashes a second and third solution, but Sakuragawa Rikka and Steel Lady Nanase continue to get in her way. Will they be able to vanquish the ghost?
The only probable answer is 
Nanase Karin's older sister.
.الجواب المحتمل الوحيد هو أخت ناناسي كارين الكبرى
Dafür kommt nur Nanase Karins
ältere Schwester in Frage.
La única probabilidad sería
la hermana de Karin Nanase.
La única probabilidad sería
la hermana de Karin Nanase.
Ça ne peut être
que la sœur aînée de Karin.
Non riesco a pensare ad altri che
alla sorella di Karin Nanase.
A única resposta provável é a
irmã mais velha de Karin Nanase.
В голову приходит лишь одно имя:
старшая сестра Карин.