Kozue Fukuda shares a marriage with Takanori Fukuda, her workplace acquaintance turned spouse. She holds shared university history with Takanori, Rikuo Uozumi, and Shinako Morinome. Her features include brown hair and aubergine-colored eyes. As an employee, Kozue exhibits a pragmatic life approach, mirroring Takanori's perspective that marriage functions as a practical partnership centered on career progression and financial security. This stance distinguishes her from the less defined lifestyles of former university peers. Within her marriage, Kozue acts as a stabilizing influence on Takanori.