From an early age, his master had instilled in him that he would become a murderer when he grew up, to succeed and pass on the name that everyone feared.
He accepted his fate with no resistance and didn't have many opinions. Anyway, he had been paralyzed by watching his master kill people since he was a child. If it was his turn to take action, he would never be soft-hearted.
This idea has never changed in his mind, and he also believed that he could be cold and ruthless. It was not until he was ten years old that he happened to meet a two-year-old baby during a mission, and he discovered that this was not the case.
He hid the little boy in a soft heart, so that the baby could escape from the master's sword and survive. It was just a simple thought and action, but unexpectedly, this rescue linked his and the boy's lives together again.
The life-killing knot was originally just a knot that left evidence of murder, but it unexpectedly caused the relationship between him and the boy. If he really wanted to, he would say that he did not regret saving the boy, and he would be willing to pay no matter how high the price was.