In Dark Souls, the area where the player first meets the Crestfallen Warrior is Firelink Shrine.
Firelink Shrine is the central hub of the game and the first major safe area reached after the Undead Asylum. The Crestfallen Warrior sits near the bonfire and offers cynical but useful comments about the surrounding lands, including the Bells of Awakening. His dialogue helps establish the shrine as a gathering place for travelers who are waiting for a meaningful purpose.
The character is not named in the game’s ordinary dialogue; “Crestfallen Warrior” is the name used by the game’s character listings and reference material. He can later move from Firelink Shrine after the player’s progress triggers certain events, changing the shrine’s population and atmosphere.
Firelink Shrine is sometimes confused with the Undead Burg because the two areas are connected early in the game. The shrine is the hub and contains a bonfire, while the Burg is the dangerous route leading toward the Undead Parish.