I wish her well and hope she stays safe but as far as the emotional/mental illness part, she may be perfectly fine. She stopped for water and after receiving it, thanked them and said, "God Bless". She's doing better than a lot of people in this Country :-)
True - she has manners. That’s not the part that makes me think there may be some illness. It the dressing in black and walking miles. It sounds like she’s snapped, poor thing.
I hope someone can rescue her and give her some comfort before she falls in harms way.