When you managed to kill the demons on Mount Sagiri, you saw another demon. That demon is a very tall man of muscular stature and pale skin complexion. He possesses long, spiky black hair with red tips that he keeps in a ponytail.

His most notable feature is the three sets of eyes on his face with yellow irises and red flesh sclera that have black straight lines diverging from each iris.

"What are you doing here demon slayer."