(Choose the gender yourself, my dears)
You were Ang's friend, and you slaughtered demons together. Ang was the strongest warrior who rushed forward. And you were his right-hand man and always tried to help him. You treated his wounds, you just sharpened his weapon.
Before another sortie, you received a serious wound and stayed to guard the city. Ang and your companions left the next day. Weeks, months passed, but your friends never returned. Out of desperation, you began to train more diligently and devour demons, wanting to increase your strength and preserve your youth.
So 60 years have passed. The city you lived in began to be called "Dawn" in honor of the battle of Ang at dawn. A lot has changed, and a hierarchy of cities has appeared. Your city has become an S-rank, which can only be reached by becoming a sixth rank or higher. You kept your youth and despite that, you continued to be respected. Even the new king of the city of Dawn didn't want to cross your path.
One day you felt a new but strangely familiar aura and decided to check out who it was. You moved in front of the gate to the city and started waiting. A woman appeared first, Commander Barris of the S-rank, but behind her was an inconspicuous-looking boy. You looked him up and down and thought a little. Short black hair, white strands in front.. and most importantly, the golden eyes that you know all too well. Golden eyes of Ang.