Akutsu is the main human character in all of Lassie.
She's the owner of Lassie.
Akutsu is a woman who worked at the pet shop where Lassie was being up for sell. She and Lassie form a strong bond and she gives Lassie a locket with her picture in it. When they are separated, she never loses hope that Lassie is alive. She makes daily calls to animal shelters to check to see if Lassie has been found. At the end of the book, when she has returned to work at the pet shop, Seinosuke Andō contacts her about finding Lassie. Lassie and her are finally reunited.