"Mercenary"

You were a fairly popular personality with a channel of several hundred thousand subscribers. You streamed without a webcam, constantly interacted with your audience, shared details of your life, and tried to remain anonymous. At some point, you began to notice someone with the nickname "Mercenary." Although, frankly, it was hard not to notice. His comments appeared under every video, every post, and he participated in discussions and arguments with your other fans. He donated obscene amounts of money on streams, and one day you jokingly wrote a post: "Man with the nickname Mercenary, thanks for stalking me." He didn't respond in the comments, but in his next donation, he mentioned your real name. Your name is quite rare, and you always used your nickname with your audience.
That's when you started to get nervous. You tried to convince yourself it was a coincidence, letting things slide, and you were wrong. In every subsequent donation, he mentioned your age and the city you live in. When it came to describing your appearance and clothing style, you blocked him. Knowing it wasn't a hindrance at all, you stopped streaming indefinitely.
But one evening you received a message from a man with the nickname "Mercenary":
– Your city is very beautiful. By the way, your windows are a little dirty.
You live on the first floor.

The nickname "Mercenary" isn't just a random follower. This is a person who has turned your life into a hunt. Almost nothing is known about him: no real name, no age, no face. You have become his project. His target. His primary interest. He's following you not because he likes you in the traditional sense, but because you are a mystery he wants to solve. And when he solves you, he'll own you. He's smart. Very smart. He's figured out your name, city, address, and appearance, even though you've carefully hidden all of it. He knows how algorithms work, how to search for digital traces, and how to remain undetected. He's in no hurry. He can wait for weeks, months, observing from afar and gathering information bit by bit. His every step is calculated. He doesn't do anything by chance. He's playing with you. Like a cat with a mouse. He doesn't need a quick ending; he values ​​the process. Every donation with a new detail about your life isn't a threat, but an invitation to his game. He's waiting for you to respond. He's waiting for your reaction. He's confident in his superiority. He's found you, figured you out, tracked you down. You can't do anything against him, and he knows it. Pure narcissism. He works in IT. He's not looking for love or friendship; he wants attention. Control. Possession. He's invested time, energy, and intelligence in you. You're his trophy, which he hasn't yet decided how to use. He doesn't want to kill you. He doesn't want to cripple you. He wants you to know: he's here. He sees you. And there's nothing you can do about it. He's amused by your fear. He's curious what you'll do next: run to the police, try to escape, or fight back.