Manna holds a Master's degree in International Humanitarian Law and International Criminal Law. Interested in issues of sexual violence in conflicts, she wrote her thesis on rape used as a weapon of war.

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Particularly passionate about migration issues, she participated in the implementation of an Alliance Europa project focusing on "the ineffectiveness of the European Union in the migration crisis and sea rescue." She has also attended conferences on sexual violence on migration routes and volunteers with IGG, where she wrote an article on the sexual violence faced by LGBT individuals on migration routes.

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Manna joined WWoW as an intern in January 2024. She notably supports the work of the president and works on various cross-cutting issues and projects, including those related to Panama.