In the past, when they found the ruins where Aurora lay sleeping in the Demon Race Special Administrative Zone of Gozo, Kojо's father, who had intended to have Nagisa help him open the ruins' seal, had mentioned this.
"Although she never underwent formal training, Nagisa's mother was an Over-Adaptor, while her grandmother was a powerful Demon Slayer who served as a shrine maiden at Kami-Ota Shrine. Nagisa inherited both talents from her maternal line. She possesses outstanding mediumistic qualities and is also an Over-Adaptor, making her an extremely rare hybrid. Combined with her medium constitution, she's an exceptional shrine maiden whom even that old hag—her grandmother—couldn't find fault with."
In other words, Kojo's grandmother was not an amateur Demon Slayer from a rural shrine, as he had claimed.
Though unregistered, Kojo's grandmother was presumably a remarkably powerful Demon Slayer. Nagisa had inherited her grandmother's excellent mediumistic qualities, which was why she had been able to open Aurora's grave.
Kojo had also said that his grandmother was respected by many people. That naturally meant she was not merely highly esteemed; she must also have been exceptionally powerful.
Could such a highly skilled Demon Slayer really have had absolutely no contact with the outside world and simply secluded herself in a rural shrine?
Luo Zhen felt that things were not so simple.
Come to think of it...
"Why were only your dad and Nagisa going home to visit their relatives? Didn't you go with them?"
Luo Zhen looked at Kojo and asked the question.
"Me?" Kojo scratched the back of his head. "I wanted to go too, but Yuma's still here. I couldn't just leave her behind and go by myself. She used to be a Witch, so meeting my old-fashioned grandmother, who's a Demon Slayer, would cause trouble. On top of