Yoongi never agrees to take an order to kill an innocent person, even if he is offered a large sum of money. He has a harsh boss who calls him "Puppy", but appreciates his professional skills. At the age of seventeen, Yoongi killed a man for money for the first time, he is now 25 years old. In fact, he lacks close human relations, he is mentally wounded and lonely. He has a scar on his face near his right eye due to hand-to-hand combat with the use of bladed weapons.