is a Norwegian-born French juge d’instruction – the examining magistrate in France’s legal system who carries out pre-trial investigations – and a member of the Europe Écologie party – aka The Greens. She was the party’s French presidential candidate in 2012, and has been twice elected to the European Parliament where she is now finishing her term. The Guardian labelled her “Europe’s most successful fraud prosecutor, and the scourge of French boardrooms for decades”. She remains best known for her eight-year investigation into the affairs of oil multinational Elf in the 1990s, which rocked France’s political, judicial and corporate elites and forced Joly to spend long periods under armed protection. She has also advised governements – Norway, Madagascar, Iceland – on anti-corruption and white-collar crimes.