Matou Sakura was an extremely crucial figure in the Fifth Holy Grail War.
She had originally been Tohsaka Tokiomi's second daughter and Tohsaka Rin's younger sister. However, because the Matou Family had no suitable heir, and Tohsaka Tokiomi possessed only one set of Magic Crests, she was adopted into the Matou Family.
She possessed exceptional magical talent, as well as the unusual attribute known as "Imaginary Number."
It was precisely because of Matou Sakura's unique attribute and personality that, having been implanted with a Holy Grail fragment during the Fourth Holy Grail War and turned into a pseudo-Holy Grail, she had gained the ability to communicate with and control the Holy Grail to a certain extent.
However, in the other two normal routes, her Black Grail never fully matured. It could be said that it was suppressed by her own personality.
Only after her heart collapsed and a weakness appeared could someone take advantage of it.
Because Shinji had been influenced by Xu Yue, Sakura's living environment was undoubtedly much better.
Yet with Old Man Matou, who had clung to life for five hundred years, around, she naturally still had to endure the torment of insects devouring her body while her magical attributes were altered.
As one of the initiators behind the construction of the Greater Holy Grail system, Old Man Matou had provided the Command Spells used to bind Heroic Spirits. Back then, he had been an ambitious man with justice in his heart.
But now, he was merely an old schemer whose heart contained nothing but the desire to survive.
Having lived for so long, he could naturally see Sakura's weakness!
Or rather, because Shinji was no longer abusing Sakura, deep within her heart she had developed even greater longing and expectations toward Shirou Emiya. Thus, using that