Sif is the Great Grey Wolf from Dark Souls, a massive wolf who serves as the loyal guardian of the grave of Artorias the Abysswalker. As a boss character, Sif is one of the game’s most memorable and emotional encounters, fighting the player to protect its master’s legacy. Sif wields a huge sword in its mouth and is known for its tragic, noble role in the story, symbolizing loyalty, duty, and loss.