Rousseau competed at the
2014 International Gymnix alongside
Rose-Kaying Woo,
Shallon Olsen, and
Megan Roberts, and they won the junior team silver medal behind Russia. Individually, she placed sixth in the all-around and fourth on the uneven bars. Rousseau became
age-eligible for senior competitions in 2015. At the
2015 City of Jesolo Trophy, she helped Canada win the team bronze medal. She competed at the
2015 World Champiopnships and helped Canada advance into the team final and thus earn an Olympic berth. She competed on the floor exercise in the team final where Canada finished sixth. Rousseau helped Canada win the silver medal behind the United States at the
2016 Pacific Rim Championships. She finished seventh in the floor exercise final at the
2017 City of Jesolo Trophy. In June 2017, she had surgery on her hand. She announced her retirement in February 2018 due to multiple injuries, but she decided to return to competition in 2019. At the
2019 International Gymnix, Rousseau won a vault gold medal and a silver medal on the floor exercise behind
Emily Lee. She won the balance beam title at the
2019 Mersin World Challenge Cup, and she finished fourth on the vault and seventh on the floor exercise. She won the all-around bronze medal, behind Lee and
MyKayla Skinner at the
2020 International Gymnix. She then competed at the 2020 Baku World Cup and finished third on the floor exercise during the qualification round. However, the event finals were canceled due to the breakout of the
COVID-19 pandemic in Azerbaijan. Rousseau competed at the
2021 World Championships and was the first reserve for the vault final. At the
2023 Szombathely World Challenge Cup, she finished fifth on the uneven bars and seventh on the floor exercise. She won the uneven bars bronze medal and the floor exercise silver medal at the
2025 Doha World Cup. ==References==