Artorias is a holy warrior with an unbendable will of steel and unmatched skill with a greatsword. He is one of Gwyn's Four Knights and his personal symbol is a wolf, as his companion named Sif. By the time the Chosen Undead encounters him, Artorias is shown to have already been corrupted by the Abyss with his armor looking putrefied, oozing an aura of darkness. His crippled arm is likely the result of Artorias halting the spread from devouring his wolf companion by means of a now missing shield. He possesses a greatsword that has also been consumed, yet is still far from ineffective. Having lost his sanity, the knight moves about in an untamed manner as he howls beneath the blue shroud of his helm.
His legacy as a hero lasted for centuries. By the time of Lothric, there was the Undead Legion of Farron, who were commonly called the Abyss Watchers. They partook of wolf blood, and it is said that their souls are bound together and are one with the soul of the "wolf blood master", most likely Artorias. Wielding greatswords modeled after his, and fighting in wild ferocious styles, the Legion fought a veritable war with the dark of the Abyss that their master had fought ages past.
"Thou shalt see further on, an Abyss was begat of the ancient beast, and threatens to swallow the whole of Oolacile. Knight Artorias came to stop this, but such a hero has nary a murmur of Dark. Without doubt he will be swallowed by the Abyss, overcome by its utter blackness... Indeed, the Abyss may be unstoppable..." — Elizabeth