>>40251823(Gran)ny, (Gran)dmother, or (Gran)dma
"Gran" is a very casual way of referring to your grandmother, but it isn't childish like granny would be.
Sonia is depicted as being a very casual, easygoing character compared to her more strict and regimented grandmother. It's the inverse of the Gen 6 and 7 dynamics, where the assistant (Dexio/Sina and Lillie) is the more serious, disciplined character, and the professor is the vibrant, emotionally expressive, and ranting one (Sycamore and Kukui).
