My child, on the day you were born, your name echoed throughout Fuyuki City: "Rin Tohsaka." My child, I proudly watched you grow day by day, becoming the embodiment of "Iron Fist." Remember, we have always lived in this world with elegance and "wisdom." I also believe you will use the power of "dropping the ball" cautiously. But true victory comes when I bear the blame. One day, my life will come to an end, and you will become a demon!

As she merges with the alien soul within the twisted insect hive. Zouken Matou's beloved 'granddaughter,' Tokiomi Tohsaka's beloved 'daughter,' Rin Tohsaka's beloved 'sister,' and Shinji's beloved 'partner,' the Counter Force's most troublesome 'partner.' The number one creator of 'Singularities' and 'Lostbelts.' Chaldea's greatest enemy... Matou Sakura officially raises the flag of rebellion against fate (plot)... The stories of works like "Gudako, Don't Come Near Me!", "Matou Sakura, Stop Causing Trouble!", and "How Could My Sister Tohsaka Be a Pervert!" begin!