Demidowa had her first international success at the Junior World Championships 2015 in Chiesa in Valmalenco with the silver medal in the halfpipe. In February 2017, she started the Freestyle Skiing World Cup in Mammoth for the first time and came in 22nd. In March 2017 she came 12th at the Freestyle Skiing World Championships in Sierra Nevada and first in the halfpipe at the Russian Championships in Sunny Valley . In the 2017/18 season she achieved three top ten placements, including third place in Secret Garden Skiresort, eighth place in the Halfpipe World Cup. At the season highlight, the 2018 Winter Olympics in Pyeongchang , she came in sixth place. At the end of March 2018, as in the previous year, she became the Russian halfpipe champion. At the 2018 Junior World Championships in Cardrona , she won the silver medal with 84.8 points.
In the winter of 2019/20 Demidowa won the Halfpipe World Cup with one victory and three more podium places. She finished seventh at the Winter X Games 2020 in Aspen .
Russia