She was trapped for neutering about 6 years ago. She used to roam the neighbourhood with a black cat that eluded trapping. A few years ago, the black cat disappeared and was never seen again. Since then she remains alone and shy. The advantage of such a wary personality is better survival in our cat-unfriendly environment. The disdvantage is that it would be difficult to care for her should she fall ill or be injured.