Fe: Molly is the perfect mother – she adopts Harry like a member of the family, and makes sure he has gifts under the tree at Christmas. She runs her household with attentiveness to the needs of her children, and even though there isn’t much money, ensures that everyone is provided for. She frets constantly that the people she loves aren’t safe, and does everything she can to make sure they are safe – even if that means smothering them, and forbidding them from involvement in Order business. Her biggest fear is losing the people she loves. Her drive for harmony makes her miserable when Percy isn’t speaking to any of them, and Arthur is upset about it.
Si: She is down to earth and practical, rather intolerant of her children’s fantastical ideas. Molly wants them to finish school and get proper jobs, not bust out of Hogwarts and start up their own business. She is about security and respecting social rules. Molly keeps things about her that offer her reassurance, and remind her of a comfy, happy home. Her focus is on the immediate and essential needs of her family.
Ne: Her imagination can sometimes get the best of her; Molly gets a lot of her ideas from external sources, be that rumors about Hermione written by Rita Skeeter or going to Lockhart’s books when dealing with common household pests. Her ability to grasp the big picture allows her involvement in the Order, and the continuing fight against Voldemort, but under stress, Molly starts to panic as she thinks about the million ways everything could go wrong.
Ti: Questioning things isn’t her strong point, but Molly makes evaluations according to her principles. She doesn’t often share her thought process, just her conclusions. And when there’s a problem, she kicks into high gear in figuring out a creative way of solving it.