A Belarusian sprinter, who refused to board a flight back to her home country out of fear she would be arrested after publicly criticizing her coaches at the Tokyo Olympics, revealed her grandmother also warned her it was not safe to return. Krystsina Tsimanouskaya of eastern Belarus has since fled to the capital of Poland instead, where she arrived on Wednesday and has been granted a visa on humanitarian grounds. The 24-year-old told the BBC that while she was being transported to the airport, she was able to speak briefly to her grandmother, who told her to “not come back” home. She then used her phone to translate a plea and showed it to Japanese police as she tried to avoid being forced onto the airplane. Tsimanouskaya’s grandmother explained that there was a massive backlash against her in Belarus’s state media, including reports that she was mentally ill. Her parents also …