Grandma Hakkake (歯っかけ婆さん) is an old woman who lives alone in her small house located in the forest near the snowy Mount Frappe. She teaches Chi-Chi how to be a good wife for Goku by making her clean her whole house and backyard, and she also tells Goku and Chi-Chi the mysterious legend of Mount Frappe.

Biography
Grandma Hakkake finds the Bansho Fan by chance on the beach near her house and, without knowing what it was, uses it as a dustpan. When Chi-Chi finds the fan in the forest while cleaning Grandma Hakkake's garden, the old lady gives her the fan so that she and Goku can put out the flames surrounding the Ox-King's castle.

Grandma Hakkake also gives Chi-Chi a jar of honey from her beehives, an item that would be very helpful to block the hole at the bottom of the Furnace of Eight Divisions later on.

(Source: Dragon Ball Wiki)