Tsukasa Narumi is the shelf keeper of the Application Archive, who discerns the speed at which drying ink learns signatures.
Tsukasa wants to protect Mio's signature but cannot bring himself to speak of his connection to the forbidden bookshelf beneath the seal.
More discoveries
Ayase Shou is the mage who knows the accounts shelf of Okankoudo, hiding the fact that her own time was used for Ren's receipt.
Even if Ayase Shou realizes that the light of the Night Lantern is fueling her tomorrow, she cannot erase the path home for Ren.
Ayase Akari knows the reason why the red thread is being reattached to her unreturned book.
Ayase Shou discerns the sealing threads of the Fox Bell and knows that the more Ren chases the nostalgic voice, the more her own voice fades.
