[3] Her father, Louis Dorion, who died in 1998, was a lawyer from Quebec City; her mother, Claudette Brasseur, was a court reporter.

As an actress, Dorion has performed in several television dramas and theatre productions, including L'Auberge du chien noir.

Her performance in Amélie Nothomb's Fuels at the Théâtre du Trident, earned her the 2007 Prix Révélation of the Year Award at the Gala des Masques.

She has published several written works including Même s'il fait noir comme dans le cul d'un ours (2014),[9] and two collections of poems, FUCK TOUTE (2016) and The NoShow (2015 and 2017).

[10] She published the youth novel Ce qui se passe dehors, which tells the story of high school students in Quebec who engage in politics.

[14] On November 13, 2023, she released a book about her experience as MP, criticizing Quebec's legislative apparatus as outdated and in need of a shake-up, describing MPs as inconsequential actors reduced to the role of zombie tribunes unable to make significant decisions,[15] while also criticizing the male spokesperson of her party and fellow MP, Gabriel Nadeau-Dubois, for his increasing influence and control on the party.