Hitoha Miyamizu

The head of the family shrine and the grandmother of Mitsuha and Yotsuha. Their family name 宮水 literally means "shrine water." She is the master of kumihimo, which is one of her family's traditions. The town 糸守 (Itomori), where she and her family live and half of the plot's events take place, means "thread-guard."

(Source: Wikipedia)