Grantaire is a skeptical man who is a part of Les Amis de l’ABC. Grantaire is knowledgeable and intelligent but has a skeptical outlook on life. He is constantly drunk as said by the novel. He was described as "unnaturally ugly" (or "frightfully ugly" and "inordinately homely" in some translations). Grantaire is also depicted as knowing all the best places to go to in Paris and is a boxer, gymnast, and dancer.
Unlike the other members of Les Amis de l’ABC, Grantaire does not believe in the causes that the group fights and dies for. The sole reason for his involvement with the revolutionary group because he believed in Enjolras, the leader of Les Amis de l’ABC. Grantaire’s fixation to Enjolras is rooted in the leader’s passionate and wholehearted belief, which Grantaire lacks. Due to Grantaire's skepticism and near-constant state of drunkenness, his feelings for Enjolras are not reciprocated. Despite Enjolras treating him harshly, he always looks up to Enjolras and saying "What a fine statue!". Grantaire, regardless of his feelings towards the cause, is a friend to the rest of Les Amis de l'ABC and valued for his easy-going nature and presumed friendliness.
Grantaire joins Joly and Bossuet at the Corinth on June 5, 1832 for breakfast. They drink heavily and are interrupted by Courfeyrac and the other Amis after Lamarque's funeral procession, and then Bossuet mentions to Courfeyrac that they should build the barricades outside the Corinth. He is scorned by Enjolras repeatedly and as a result, falls into a drunken stupor. The next morning, he awakens to find Enjolras about to be executed by the National Guard. Grantaire announces his support for the revolution, thereby condemning himself to die alongside Enjolras. The two men exchange a smile and are killed holding hands.
- Building the Barricade (Upon These Stones)
- At the Barricade (Upon These Stones)
- Javert's Arrival
- Little People
- Night of Anguish
- The First Attack
- Drink With Me
- Dawn of Anguish
- The Second Attack (Death of Gavroche)
- The Final Battle
- Empty Chairs at Empty Tables (silent)