The Child in the Window

How it all began
Me and my Friend knew each other for about a few years, and we were pretty close friends. On the day this all began, we were browsing bad creepypasta and laughing at what came up. No, this story didn't come due to some evil monster, or long forgotten myth. I decided to go to bed, and my friend didn't go to bed, Instead going to play more Roblox. I finally woke up, however my friend stayed up all night, and we started playing more games, but then I saw a user. He wasn't insane, or named "nil" or anything dumb like that, something was just off about him I couldn't explain. He began targeting my friend and even team killing just to target my friend. I know now that this user caused something to happen to my friend, but it just felt like a bad toxic child.

Next thing we know, my friend began to experience strange dreams. He refused to elaborate, and when I woke up the day after this targeting event my friend told me someone was mass pinging him on discord. I wondered how somebody got it and decided to abuse it, considering I don't even know my friends discord. It was the toxic child from earlier of course, spamming him and generally annoying him. What was perplexing however, was how he got it as he refused to elaborate.

Insanity
My friend began experiencing night terrors, as he told me. Weird nightmares in which this toxic childs avatar would appear and shout gibberish at him. The next time I saw him, he had gone almost insane. Spamming random phrasing, and the weird user from earlier joined, and starting spamming gibberish, before leaving. His sudden insanity episodes increasing as the days went on, and I grew ever more worried about him.

He went and joined my game a few days later. He said somebody was tapping on his window, which was odd. He went to peak, and it was a young looking child with a wide grin ear to ear. It noticed him, and began screaming gibberish, He screamed, and called the cops, unfortunately he was home alone. When the police got there, no body was found, only traces of that young child, tapping on the window.