[1][2][3] One of three children in a politically socialist family, Prunaud is the granddaughter of Eugène Bagot, the mayor of Plénée-Jugon from 1945 to 1959.
[4] In the 2014 elections to the French senate, she ran as the second name on the common left-wing list led by Yannick Botrel, successfully winning a seat.
[5] In the senate, she represents the Communist, Republican, Citizen and Ecologist group and has been a member of the Parliamentary Office on Evaluating Scientific and Technological Choices and sits on the board of the Centre national du livre.
On 24 June 2018, she was arrested in Ağrı along with two other French Communist Party members while serving as an observer for the 2018 Turkish general election.
[6][7] She participated in a conference titled « La souveraineté du peuple sahraoui sur ses ressources naturelles » in November 2019 in Paris, which discussed issues surrounding the role of Morocco and multinationals in resource exploitation in Western Sahara.