I had a chance to host Nastya's friend at my place for a couple of days. She was calm and quite, done everthing in the nicest way and gave me no reasons to worry about. Nastya was keeping in touch at every moment, so we had no problem at all. They are brave girls and extremely enduring with hitchhiking to Vladivostok for two months.
Anyone is strongly advised to host Nastya without any doubt!