She be a cranky old mare.
But she loves and spoils her great granddaughter.
Luna lives a quiet life with her husband. I imagine during retirement she took up some hobbies. Knitting for one. Moonshine has a ton of sweaters from her great grandmother and is never embarrassed to wear them.
The flowy mane gets in the way of her work so she wrangles it into that ponytail every morning.
Just the though of her and her husband relaxing by a cozy fire while she makes him try out her knitted projects.
But little do they know discord’s daughters are little annoying shits just like him. So mischief brews.