TW: Stalking, intrusion/breaking in, obsessive/controlling behavior, possible violence
A/N: Thank you to the anon who requested this. I hope you like it!
Arthur Fleck is definitely a jealous, obsessive type of yandere.
Due to his job(s), Arthur wouldn't be able to keep a constant eye on each and every move of yours.
Still he would find a way to let you know that he was always watching you.
After following you to your workplace/school once, he would make a habit of leaving you small notes there. The notes would be things such as "I'm watching you <3" or "You our so pretty" or "Can't wate to marry you :) "
How did it all begin, you ask? Well, it all started when you showed up at his doorstep on a plain Thursday night. An envelope - perhaps a bill - addressed to one "Arthur Fleck" was delivered to you by accident. So, you took it to the address listed on the bill, and found yourself face-to-face with the tall, green-eyed, thin man.
You gently told him what had happened, handed him the bill, and politely bid him goodnight.
Taken aback by your willingness to do the right thing, Arthur became intrigued with you. After you left, he wanted nothing more than to see you again.
The next day, you met Arthur by accident at Pogo's, a comedy club within Gotham. Drinking a bottle of inexpensive liquor or beer, you sat at a table alone...when all of a sudden, you saw Arthur take the stage.
His jokes were...fair. You liked some of the things he said about his schooling. So out of support, you laughed along with him with the best grin that you could muster.
You thought it was just harmless encouragement. But to Arthur, that was the confirmation to solidify what he already believed: you were made for him, that you were an angel sent from heaven to bring him joy in this dreary life of his. And that he could never let you be hurt by anyone, including himself.
Much of what Arthur did was...rather tame. In addition to leaving you notes, he would surprise you while you were on the way back from work/school. He'd give you a spontaneous song-and-dance routine, something inspired from an old film or one of his jobs as Carnival.
When he had a little extra money, he would leave a cheap, small box of chocolates or candies at your workplace. Along with a crude drawing of you and him as stick figures, holding hands surrounded by hearts.
It was easier not to take it personally, even though something in your gut felt very, very wrong about Arthur. He needed help, he needed a professional intervention from a therapist far better than the shoddy ones in the city. Still, a part of you thought that maybe he was just having a little crush, and that it would pass.
But everything changed one Saturday night. It was after the famous talk show host Murray Franklin was assassinated on live television by a comedian known as the "Joker" wearing a colorful costume and clown makeup.
Coincidentally, Arthur was mysteriously gone from you life. He was nowhere near you, much to your surprise. Relieved a little, you relaxed in your apartment with your favorite comfort food and a feel-good television show.
Just then, there was a knock. A familiar voice, calling your name.
Annoyed, you opened the door with a huff. "Arthur, how the hell did you- " At your door stood the same man who killed Murray Franklin, clown makeup dripping in all of its maniacal glory.
"There's no one to stop me now, doll," the Joker sweetly spoke, entering your apartment with a confident stride. "We can finally be together."
You trembled, trying to think of an escape route, any way to get out of this situation. "Arthur, please..."
The Joker slammed your door shut, and turned the lock. "I'm not him anymore, doll. I'm your world now. And don't even bother calling the police..." He pulled out a gun from his pocket and fired two shots at the door, causing you to scream.
"Now, now..." the Joker knelt, stroking your cheek with his thumb. "I'm not going to hurt you. You're mine, remember?"