The author of two Alice books that are currently in print and somewhat of an antagonist. His main goal is to get Alice Users to bring him stories of the other Alice Users that are defeated in order to expand his collection of stories to create Eternal Alice, a book that is rumored to grant wishes to whomever puts it together. He invites Arisu Arisugawa and Aruto Kirihara to a tea party; Aruto and Arisu venture to the house where it is rumored that Tachyon lived and pass through a mirror to the dimension where Tachyon currently resides. He passes himself off as Tachyon's successor and shows an interest in Aruto's abilities. He is accompanied by three servants: the librarian and two little girls named "Alice". It is suggested in the Manga that Tachyon was used instead of the Alice book's original author Lewis Carroll because of how Tachyon is portrayed in the series.