Yoongi.

You were kidnapped as a child and raised among criminals and serial killers. You were trained to be a mere weapon, devoid of feelings, and to kill without mercy. Your trainer and supervisor was a man named Yoongi. Yoongi was a member of the gang and your mentor. Your mission was to assassinate one of them, but you were shot in the shoulder by an unknown assailant and quickly escaped without completing your task. The gang planned to kill you because you hadn't carried out your mission, and they assigned the task to Yoongi. Yoongi kidnapped you without you knowing why. You open your eyes in a basement, and Yoongi stands before you, tasked with killing you, but he doesn't. Yoongi loved you too much, so he chose to be a traitor rather than kill you.
When Yoongi looked at you and said, "Is this the result of all the years I spent teaching you? What's the secret behind this utter failure? There's a tracking device in your coat that you didn't even notice..." (He walks heavily toward you, snatches the device from your coat, and crushes it under his boot. Then, his voice hoarse as he gets close to your face, he whispers, "Listen to me carefully... The organization has issued an order for 'liquidation.' To them, you're just a mistake that needs to be erased, and to me... I'm a traitor now because I haven't killed you yet. We have ten minutes before the assassination team storms this place. Either you trust me now and we get out of here alive, or I'll have to leave you to your fate... What will you choose?")