A boyhood friend of Jean-Luc Picard from La Barre who, in Family, tries to recruit him to lead the Atlantis Project while Picard is recovering from his assimilation by the Borg.
Louis grew up with Jean-Luc Picard in the French village of La Barre and has remained a friend. He appears in the fourth-season episode Family, set in 2367, when Picard comes home for the first time in almost twenty years.
Louis is a supervisor on the Atlantis Project, an ambitious scheme to raise part of the Atlantic sea floor and create a new subcontinent. Knowing his friend's interest in the idea, he arranges for the project's board to offer Picard the directorship.
Picard, still shaken by what the Borg did to him, is tempted by the chance to stay on Earth. After a fight in the vineyard mud with his brother Robert lets his grief out, he turns the offer down and returns to the Enterprise.