Sif, known as the Great Grey Wolf Sif, is a legendary wolf in the Dark Souls series. Sif is fiercely loyal to its former master, Artorias the Abysswalker, and guards Artorias' grave in the dark forests of Lordran. As a boss character, Sif wields a massive sword in its mouth and stands as a formidable opponent. Sif's tragic story and noble demeanor make it one of the most memorable and emotionally resonant characters in Dark Souls.