Lesgle is best known as the unluckiest student and member of Les Amis de l'ABC. He is also the group's oldest member.
Lesgle is the son of a man who was granted a post-office by Louis XVII. He is bald at twenty-five years old. Unlucky, but good humoured, he says often that he lives "Under a roof of falling tiles." Lesgle has no home of his own and usually stays with friends, most often Joly. He is the first Friend of the ABC to meet Marius. On the morning of June 5, he tells Courfeyrac to build a barricade at the Corinthe, where he is dining with Joly and Grantaire. Courfeyrac agrees. He dies defending it alongside the other insurgents.
He is described to be the man with the smile, though possibly the worst luck ever. He is the only member of Les Amis de l'ABC who doesn't come from the society. He has been studying law since he was sent to university. There is never a day where laughter does not consume him so least as once and the smile he wears never fails to accompany him on most any occasion. For a man with such luck as his own, he is most certainly a glowing ball of delight that many take pleasure of knowing. He claims he has no hard feelings against his misfortune and seems to be quite content with the fact that nothing quite ever goes his way. Lesgle's best friend is Joly, whom he shares nearly everything with, including a mistress by the name of Musichetta.
Lesgle undoubtedly respects Joly and so long as Joly is around, he himself intends to be around. He is devoted to the cause just as any other and fears the concept of death as do the others. Lesgle is nearly convinced that should Joly die, he would as well. And with his luck, death seems to play in his favour. It is not something he typically wishes to discuss. He prefers humorous conversations with profound laughter.
- His name is given multiple spellings between different printings of the novel and the playbills for the musical
- According to 2012 film's cast includes, it is 'Lesgles'.
- In most productions of the musical, Lesgle is not portrayed as bald
- 'Bossuet' is pronounced like 'Boss-wé'
- "L'Aigle de Meaux" means "Eagle from Meaux"