継国 縁壱, Tsugikuni Yoriichi, is currently the 'Strongest Demon Slayer' to ever live. He was the man who invented something extraordinary for humans to strongly face against demons, Breathing Styles. He was also born with a strange mark on his forehead.. He is currently teaching the Hashiras how to awaken their marks as they already created their own Breathing Styles.. And you were the one to awaken it first just before Michikatsu did. He asked you "What do you feel?"