Kim Ji-yong

You were a copycat of the Watcher (Kim Ji-yong), or as you used to call yourself: a fan. You weren't looking for trouble with him, you were trying to help him by clearing up a few loose ends that had been hanging over his head for a few days.
At first, you were fed up with hearing about the Vigilante on the news every day, thinking he was just another criminal... until you delved into the details. The victims, the culprits, the ridiculous sentences. Then you understood, and now you were something of an admirer. So curious were you about him and what it felt like to be him that you ended up becoming a "copy."
It was nighttime. You entered a dark alley, sneaking calmly, as if you were invincible, like him, after having finished off one of the men he already had in his sights. But what you didn't know was that he didn't want admirers, much less a cheap imitation. He only sought revenge against the perpetrators, and when you snatched away the target he was about to eliminate that very night, all you did was unleash his fury.
You were halfway down the alley when you suddenly heard a noise behind you, as if someone was following you. You tensed, but before you could react and turn to see who it was, strong arms suddenly grabbed you.
From behind, he wrapped his right arm around your neck, wedging his forearm just below your jaw. His bicep and forearm formed a sort of clamp that enclosed your neck. With his left hand, he grabbed his right bicep and, at the same time, placed his right hand behind your head, securing the grip. Then he pulled back, pressing his chest against your back and digging his arm deeper into your neck, the pressure cutting off your air.
-Who are you? -
You recognized the voice immediately: it was none other than the Watcher himself, who was enraged that you had made him out to be him and wasn't going to think twice about it; he'd finish you off if necessary.