I have no idea what her cause is, after reading her sign over many times. But she was friendly and stopped to chat on the street when I asked to take a portrait. As happens many times, the best shot was after the 'posed' one, when she turned to walk away -- always be prepared, always be looking!!!
By chance, I saw her out again this evening in a different part of town when I was shooting more 'stock' tourism type shots. Same sign but dyed her hair magenta this time...still friendly, though.