Hitoha Miyamizu

宮水 一葉
The head of the Miyamizu family and the maternal grandmother of Mitsuha and Yotsuha. Hitoha is a calm and composed woman with a strong love for her family especially her granddaughters. However she isnt particularly fond of her soninlaw since he rejected the Miyamizu shrine and its traditions to pursue a career in politics calling him that stupid son. Source: Kimi no Na wa. Wiki