Lechenault made her senior debut at the 2016 WOGA Classic where she won the silver medal on the balance beam behind Madison Kocian. Then at the 2016 City of Jesolo Trophy, the French team finished fourth. She was then selected to compete at the 2016 Olympic Test Event with Marine Boyer, Marine Brevet, Loan His, Anne Kuhm, and Louise Vanhille. The team finished fourth and qualified for the final team spot for the 2016 Olympics. She then competed at the European Championships with Boyer, Brevet, His, and Alison Lepin, and they won the bronze medal behind Russia and Great Britain. She finished sixth in the all-around at the French Championships and won the bronze medal on the floor exercise. Then at the Chemnitz Friendly, the French team won the silver medal, and Lechenault finished eleventh in the all-around.