…in reply to @JustinMezzell
      It would be my honor! You first meet Artorias in Oolacile, where he has become consumed by the Abyss he set out to destroy. We first meet Sif guarding his grave, still his steadfast ally and protector even in death. In DS3, however, I believe you encounter Sif again.
    …in reply to @404boyfriend
    In the swamps at Farron, you find the body of the "old wolf of Farron", and also the Abyss Watchers Legion, a knighthood dedicated to fighting the Abyss...that were eventually consumed by it...and defeating them allows you to shape their soul into the Wolf Knight Greatsword.