Yuka Katagiri

As the adoptive mother of Yuuichi Katagiri, this character appears primarily through scattered, poignant flashbacks throughout the series. Although she is presumed to be deceased, her influence remains a cornerstone of the protagonist's moral compass. Unlike the cynical guidance provided by Shiba, her lasting legacy is the profound lesson she instilled in Yuuichi: that the value of true friendship far outweighs any material wealth or monetary gain.