Haibi's Granny (ビスカスちゃんのおばあちゃん, Bisukasu-chan no obaachan) makes an appearance in the second OVA. Her grandchildren are Haibi and her two siblings. When her grandchildren were young, she used to tell them stories of her adventures, much to their delight.
She got heatstroke while gardening during a very hot summer, and in an effort to make her feel better, Haibi went off in search of her grandmother's secret treasure.
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