3rd person POV
Slenderman opened an envelope that was addressed to him from Mr.Creepypasta. Sitting up a bit more in his chair inside his office, Slender pulled out the letter.
"Hello again, Creepypastas.
This is a urgent letter and a task. Start watching over the human named (y/n) (l/n). Do NOT kill this human, that is a strict order. I will not tell you how this human is important but they are. It will be fun to see how things turn out and for you to figure out how this human is important to you. I have written the human's address on the back of this letter.
- Mr. Creepypasta"After reading the letter, Slenderman teleported to the livingroom. Scaring some Creepypastas in the process. "FUCKING HELL! WHY DO YOU ALWAYS DO THAT?!" BEN said angrily before pausing his game. Slenderman ignored his angry remark. "Creepypastas, livingroom, now." He says with a booming voice.
Across the whole mansion he was heard and all the Creepypastas gathered into the livingroom. Many with angry or irritated looks. "What now?!" Jane asked, very irritated. Lots of angry commentary went around throughout the room.
"We received a later from Mr.creepypasta. Pay attention! Sally, please read this out loud." Slenderman says as he hands the little girl in a pink dress the paper. She reads it out loud and the Creepypastas quiet down to listen. Once finished, she turned over the paper and read out the address.
"Ok, and?" Jeff the killer goes, obviously still annoyed. "This is to make sure everyone knows not to kill this human. Toby, you are going to find this address and see what kind of human we are dealing with. "Yes sir!" Ticci toby goes before grabbing the paper and running out the door. Slenderman sighs at the proxy's actions. "Dismissed." He says and goes back to his office. The Creepypastas going back to what they were doing.
~with (y/n)~
"Shit!" The teenager goes as she runs as fast as she can. The intimidating bark and growls of a German shepherd follow her. "Nope!" (Y/n) yells and jumps over a wooden fence, leaving the angry dog on the other side.
She sighs of relief with her eyes closed. "Geez, who let's their dog run around the streets? Dicks, most likely." A gasp escapes a womans mouth when the then says the dirty word. The sound makes the teen look at her surroundings.
A table with a variety of food, balloons, a clown, presents stacked up on a different table, 15-20 kids, 5 adults, a cake, and most notable a banner that says "happy birthday!". "Ooh.. I landed up in a kid's bday party." The parents were frozen in shock and the children had no clue on what to do.
(Y/n) walks over to the table. "Heeeeyyy theeerre.." she looked at the cake "Kevin! Happy bday, bud! My gift to you is a new word. It's 'Dick'. What is it you ask, its what's inside your pants!" The mother and so applaud by those words that her jaw was wide open.
"GET OUT!" The mother yells, throwing what was closest to her. Which was the hot spatula that was being used to grill. "Whoa! Angry mom!" (Y/n) quickly dodged the thrown object, only to have it smack into the little boy's face. The teen made her quick escape while the child screamed. Quickly running back to her house. "My God, what I day!" She says before plopping onto the couch.
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A/n: here it is guys! I hope you enjoyed the prologue, I tried to make it extra long since it was the winner of the votes!

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His Proxy (Creepypasta x reader)
FanfictionSlenderman receives a letter from Mr.Creepypasta to watch a certain girl. This girl doesn't have a desire to kill but a desire to move and to be a rebel. Mr.Creepypasta says that she will be very important but never says why.