She became the captain of Brest Bretagne Handball when she joined the team in 2019.[3]
She was the captain of the French national handball team from June 2021 for the 2020 Summer Olympics during which the team won their first Olympic gold medal,[4] until September 2022, a few months before the Euro 2022.
Her younger sister Déborah Lassource is also a professional handball player.[5] They used to play together at Issy Paris Hand. Their mother also used to play handball.
She wears a number 10 jersey for Brest Bretagne Handball and a number 8 jersey for the national team.