Okaa-san closely resembles Ai-chan in that they both have same facial features, albeit having longer, smoother hair. Due to having her children when she was very young, people often mistake her as Ai-chan's older sister. Okaa-san appears to be laid-back and carefree who is rarely seen without a smile. She is very kind and nurturing to her two daughters. She is usually seen helping Ai-chan repair her outfits that repeatedly lose their buttons due to Ai's large breasts