Kumada-sensei
Kumada works as the school nurse at the elementary school where Chiaki and her friends study. She's best known for constantly teasing Chiaki, which has become something of a running gag between them.
Behind the humor, though, Kumada deals with real anxiety about her personal life. Being an unmarried woman past a certain age in Japanese society carries genuine social pressure, and she's openly desperate to find a boyfriend. Fans often note that this aspect of her character—the contrast between her job helping kids and her own romantic struggles—adds an unexpectedly relatable layer to what could've been just a comedic side character.
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