Jean Alex Harinelina Randriamanarivo, the president of the Madagascan weightlifting federation (Fédération Malgache d'Haltérophilie, de musculation et culturisme), identified Randafiarison as a key part of the team.

[8] In September 2023, Randafiarison competed in the women's 45 kg at the 2023 World Weightlifting Championships.

She won silver medals in the snatch and clean & jerk events, and total, becoming the first medalist for Madagascar in any Olympics discipline at the world championship level.

[10] In August 2024, she became the third woman to represent Madagascar in weightlifting at the Olympics, following Nathalia Rakotondramanana in 2012 and Elisa Vania Ravololoniaina in 2016,[3] when she competed in the women's 49 kg event at the Summer Olympics held in Paris, France.

[3] Her husband is Claudio Fanantenana Randrianavalona, who was the 2019 Madagascar champion in snatch, clean and jerk, and overall, and a gold medalist at the 2023 Indian Ocean Island Games.