The story was that once upon a time, a girl named Kairi was murdered by the bench in the park. Her death was bloodless; she had been strangled. But Kairi was very forgiving to the man that was about to kill her, and said to him, "You don't realize what you're about to do. You can't think clearly. But there's something very dear to you, I know it."
She died.
The next day, a person reported the murder. A funeral was held and the girl was buried. The killer had been caught, and pleaded insanity. He was sentenced to death for first-degree murder.
A week later, a girl was seen at the bench in the park with a sketchpad. She wasn't very similar to Kairi; her hair color was blonde instead of red and she seemed as unfeeling as anything could possibly be. She didn't show people the future in her drawings. She showed people the past.
"This happened to you," she'd say to them, and she was right. It was always related to them, so piercingly deeply that she never should have been forgotten by them.
Whether they acknowledged it or not was up to them. She'd only appear to people who were walking around the park by themselves, and not with anyone else, because the picture wouldn't make sense if she showed it to two people at once. Then, once the person saw her, they'd never see her again, no matter how many times they came back to the park.
Some called her a ghost, the remnant of Kairi's soul as she tried to prevent what had happened to her from ever happening again by using the sketches as some sort of warning. Others argued their own theories.
But one thing was for sure. Few people believed she actually existed at all. As time passed and the girl never aged, was always only shown to one person, once in their lifetime, she was forgotten as being something significant, and they rushed past her as she tried to show them her pictures. Some people still remembered those pictures that she drew... But the longer she stayed, the less she seemed to matter. They didn't appreciate her anymore. They hadn't heard the story.
Soon, she up and left the park entirely. She was never seen again.
For those last few times she was ever noticed, ever glanced at, the girl was finally given a name.
"I think I saw someone on that bench..."
"Who was it?"
"Huh? Oh... no... never mind. It was no one. Nobody."