Sword Art Online (2012)

S2E6 Showdown in the Wilderness

A figure draped in a tattered cloak observes Kirito as he engages in his first battle. He questions whether Kirito is truly "the real deal." This mysterious man bears the tattoo of Laughing Coffin, a notorious guild of murderers from SAO. Warning Kirito that he will one day take his life, the man disappears into thin air.