Silence. It was a code name. Just like Shadow League's Arctic Fox, they were uncrowned kings whose names caused people to tremble with fear.
Arctic Fox was a hacker whereas Silence was an assassin.
He topped the assassin rankings and was known as a 'Mortal Weapon' who liked to kill in one blow. He once helped an international organization train a batch of mercenaries.
This group was especially skilled in infiltration. Their modus operandi had the bloodcurdling name, 'Shadow Kill'.
They were hard to identify and their victims did not know what was happening until it was too late.
Similar to Arctic Fox, Silence's gender and age was still a mystery. Mysterious and ruthless, Silence was the uncrowned king of the assassination world. However, just as Silence finished training the mercenaries, Lu Chengzhou got hold of the news. He tricked and captured Silence.