A devoted elderly couple whose shared history and adoption of Natsume form the emotional foundation of the series.
S5E10 backstory revelation, S6E10 jam delivery, S7E1 house setting.
A nurturing grandmother figure whose kindness and wisdom contrast with Natsume's past trauma, offering emotional safety.
S5E10 backstory exploration, S6E10 jam delivery visit, S7E1 house setting.
A thematic contrast highlighting how Touko's kindness directly counters Reiko's past, shaping Natsume's upbringing.
S1E1 Book, S5E10 backstory, S6E7 Gomochi message.
Explore the full interactive character relationship map of Natsume's Book of Friends