What is the name of the French officer who befriends Pierre during his captivity?

The French officer who befriends Pierre during his captivity in War and Peace is Captain Ramballe. Their meeting creates one of the novel's most unexpectedly humane episodes amid the violence of Napoleon's occupation of Moscow.

Pierre is arrested by French soldiers after trying to protect an Armenian family from being robbed. He is held with other prisoners and faces execution, but survives when the French authorities alter their treatment of the captives. During this period he meets Ramballe, a French captain who is curious about him and willing to speak with unusual openness.

Their conversation moves beyond national loyalties. Ramballe shares personal stories, while Pierre responds with the directness and compassion that increasingly define him. Their cordial relationship shows how individual sympathy can cross an enemy line even when armies and governments are destroying lives. Captain Murat, Berthier, and Davout are real Napoleonic figures associated with the invasion, but none is Pierre's friendly French companion in captivity.