Sif Haiiro, known as the Great Grey Wolf Sif, is a legendary wolf who serves as one of the iconic bosses in the video game series Dark Souls. Sif is the faithful companion of Knight Artorias and is found guarding Artorias's grave in the dark and mystical forest. As a protector, Sif wields a massive sword in its jaws and fiercely defends the resting place of its former master. Sif's tragic backstory and noble demeanor make the encounter both memorable and emotional for players.