[5] At the National Championships, Devillard won a silver medal on vault behind Camille Bahl, and she finished twelfth in the junior all-around final.

[7] She ended her season at the Élite Gym Massilia with a bronze medal in the Open All-Around and a sixth-place finish on vault.

[11] She ended her first senior season at the Élite Gym Massilia with a gold medal on vault and a twenty-third-place finish in the all-around.

[19] Devillard was selected to compete with Juliette Bossu, Marine Boyer, Lorette Charpy, and Melanie de Jesus dos Santos at the 2018 European Championships, and the team won a silver medal.

[23] Devillard won a bronze medal on vault at the 2019 Doha World Cup in addition to finishing eighth on floor.

"[26] On 3 September Devillard was named to the team to compete at the 2019 World Championships in Stuttgart, Germany alongside Lorette Charpy, Marine Boyer, Mélanie de Jesus dos Santos, and Aline Friess.

[29] She later competed at the Baku World Cup; during qualifications she finished second on vault behind Teja Belak and therefore qualified to the event finals.

[31] In October Devillard was named to the team to compete at the World Championships in Liverpool alongside Marine Boyer, Mélanie de Jesus dos Santos, Aline Friess, and Carolann Héduit.

In August Devillard was named to the team to compete at the World Championships alongside Marine Boyer, Mélanie de Jesus dos Santos, Lorette Charpy, and Morgane Osyssek.

[35] In May Devillard competed at the European Championships alongside Ming van Eijken, Lorette Charpy, Marine Boyer, and Morgane Osyssek.

In July Devillard was officially selected to represent France at the 2024 Summer Olympics alongside Mélanie de Jesus dos Santos, Boyer, Osyssek, and van Eijken.