In high school, I was in school for the Deaf. There was this one Deaf girl, I'll call her Kiki, she was this scrawny ginger girl. She joined in our school in middle of the year, and nobody talk to her for some unknown reason, I commend them for being smart not to talk with her. Unfortunately, I can't avoid not talking to her, because I was into anime and I draws, I'm automatically her BEST FRIEND FOREVER. She developed this incredibly unhealthy clingy obsessive behavior around me.
The thing is, she scares me. I will explain why.
Everything she does is extremely cringey. She's a straight-up delusional weeaboo. That's fine, because, I'm used to those kind of people thanks to the internet, but, her incredibly clingy behavior is on the other hands. She would cling to me all the way in the hallway, and she would sometimes physically grab me and then hissed at my romantic partner at that time and childhood best friend whenever they came close to me. This is a very awkward and uncomfortable situation to be in. Especially when they had to physically grab me back to them away from her and I became a tug-o-war rope for them.
I remember other time, she would tell me about how she would find time to leave from this world to her fantasy world where she would be a goddess of this one planet, she's the queen, and she described all citizen on that planet to be some sort of emo anime Sasuke-like men, some elves, some vampires, they all kill each others to be loved by Kiki, the goddess/queen. She talk like it's her real-life experience. I found that questionable but I nodded alongside with her as I was busy trying to draw.
Fast forwarding to several months later, we had to take state test. When we're done with our state test, I will never fucking forget this moment where I nearly shat my pant. She was very unusually serious, there was no emotion on her face. She slowly turned her head to me, and then signed to me, "I know everything about you."
I laughed, slide this off because there's no way she'd know shits about me. "Oh really? Tell me about it.

"
"I know you live with your mother, her name is [______]. Your family are [_] hours away from you. You wear a long over-the-knee socks under pants daily, and you have a low income. You also are constantly harassed on the internet, there was a webpage talking crap about you. Your childhood was- [and among with MANY more personal details, I do not wish to share here.]"
I noped the fuck out. I had to talk to one of our classmate about what just happened and he freaked out, he urged me to avoid her at all cost. He alarmed because he thinks Kiki is into some witchcraft shit which is probably how she got all of those weirdly specific personal information from.
Great. That wasn't very helpful. Now what?
A week later, she mysteriously disappeared from our school. She added me on Facebook, and at ONE time, I refused to take her advice. She blew up and screamed at me something about how I shouldn't disrespect her because she's my mother.
(Spoiler: She isn't my mother. Otherwise, that would be a baby having a baby situation.) She later deleted her Facebook account, probably for forever.
Several years later, I saw she made a new Facebook account. I've decided to message her, sending her only a middle finger emoji, because, she fucking scares me. I blocked her immediately. She made a sockpuppet JUST to do the same back at me and blocked me.
I haven't heard anymore from her since then, and it better stay this way. She creep me out, and sometimes, I wonder if she have a fantasy version of me getting murdered by emo-asian-elves-Sasuke-Marysue characters in her fucked-up fantasy world.