Seishun Anime Zenshu adapts Japanese literary classics without including a character named Saeko in its narratives or documented materials. The series' production details, episode listings, and literary sources similarly omit this name. Saeko appears in distinct unrelated contexts: as an original character in a fan wiki, as a figure in Highschool of the Dead, and within voice actress Kayoko Fujii's credits for portraying Mrs. Mikami in episode 18.