Monvoisin appeared for the first time internationally at the Junior World Championships in Warsaw in 2013 and achieved 24th place in the all-around and eighth place with the relay. She made her debut in the Short Track World Cup in September 2013 in Shanghai , which she finished in 49th place over 1500 m, 37th place over 1000 m and 33rd place over 500 m. At the 2014 Junior World Championships in Erzurum , she finished 24th in the all-around competition. In the 2014/15 season she achieved her first podium finish in the World Cup with third place in the relay in Dresden . At the 2015 World Championships in Moscow , she was seventh with the relay. In the following season she won third place with the relay at the World Cup in Dordrecht and finished ninth with the relay at the 2016 European Championships in Sochi and eighth with the relay at the 2016 World Championships in Seoul . At the Junior World Championships in Sofia in 2016 , she took 14th place in the all-around event and eighth place in the relay, and at the Junior World Championships in 2017 in Innsbruck she took 25th place in the all- around event . In the 2018/19 season, she took third place with the mixed relay at the World Cup in Salt Lake City and fourth with the relay at the 2019 European Championships in Dordrecht. At the Winter Universiade 2019 in Krasnoyarsk she won the silver medal over 1000 m and 1500 m and the gold medal over 500 m. The following season she was third in the mixed relay at the World Cup in Dresden and came in 22nd place in the all-around competition and seventh with the relay at the 2020 European Championships in Debrecen .
Personal bests
500 m 42.757 sec. (set up on February 3, 2019 in Dresden)
1000 m 1: 28.675 min. (installed on November 3, 2019 in Salt Lake City)
1500 m 2: 22.234 min. (installed on November 3, 2018 in Calgary)
3000 m 5: 27.334 min. (installed on December 4th 2011 in Fontenay-sous-Bois)
France