Per 
Item #: SCP-5450
Object Class: Safe
Special Containment Procedures: SCP-5450 is to be held in a standard 10 x 10 x 10 humanoid containment unit in Site-, complete with camera feed of the situation of the containment chamber. SCP-5450 is to be fed normal human food thrice a day. SCP-5450 is to be held in a containment chamber with absolutely no harmful objects that could harm a normal human. Other things that SCP-5450 requests is upon pending requested to Dr.███. Personnel with Level-2 Clearance or higher with the approval of Personnel with Level-3 Clearance are authorized to do a testing session with SCP-5450.
Description: SCP-5450 is a humanoid with the shape of a human female that upon further investigation is a 14-year old girl, with height of 180 centimeters and weight of 50 kilograms. Usually, SCP-5450 is neutral and docile to Foundation Staff and shows no signs of threat. However, when SCP-5450 is harmed, it will proceed to mirror the effect done to her, twice the size to the person who harmed her. Upon being harmed, SCP-5450 will continue ignore the wounds and will regenerate almost instantly. The explanation behind the features of SCP-5450 is currently unknown.
Dr. ███ is in charge of SCP-5450, including testing approval, requests by SCP-5450, et cetera.
Addendum 5450.1: SCP-5450 is found in ███, North America, after local civilians called in because of suspected child abuse. The abuser is found dead with blunt weapon wounds. Near the dead body is a baseball bat, presumably used to abuse the child.
Interviewed: SCP-5450
Interviewer: Dr. ███
[Begin Log]
Dr. ███: Hello, child.
SCP-5450: Don’t call me like that. Anyways, nice place you got here compared to my place.
Dr. ███: I’ll keep that in mind. This ‘place’ you referred to, is your home now. You won’t be going back.
SCP-5450: Neat, I’m guessing you’re some sort of Scientist trying to learn whatever ability I have.
Dr. ███: You are correct. And we only want to help you, rehabilitate you. Make you… Well, uh, how do I put this nicely? Normal.
SCP-5450: I get it…
Dr. ███: I’m sorry.
SCP-5450: No need to. I’m used to being called that.
Dr. ███: Let’s get to it then, I’m Dr. ███, and uh, since when did you realize you have this ability?
SCP-5450: Since uh, when I was eight, I think. I don’t remember. I have a slow memory.
Dr. ███: I see. How did you realize this?
SCP-5450: (in an agitated tone) I told you, I don’t remember.
Dr. ███: Okay, calm down. Do I need to stop this interview?
SCP-5450: Yes, please. I need a drink.
Dr. ███: Can someone give her a drink?
[End Log]
*Closing Statement:* SCP-5450 was then escorted to her containment cell. Request of a vending machine is pending to the Higher Rank Personnel.
Addendum 5450.2: Test Log
In her time at Site-███, we decided we need to know her abnormalities deeper, maybe we could even use it to our advantage one day. So we started a research. At first, SCP-5450 refuse to ‘hurt’ other people, in this case, Disposables. But she warmed up to the idea.
Test Log 5450.TL.1.SUMMARY
Subject: SCP-5450
Preface: D-20958 was introduced into the cell. SCP-5450 shows signs of happiness since she has almost never saw a real human before.
Test Notes: D-20958 was confused watching how SCP-5450 reacted. Later, Dr.███ introduced a piece of paper that said, “Hit her.”. Dr.███ knew exactly what would happen if he told the Disposable through the intercom. SCP-5450 would lose trust in The Foundation. SCP-5450 is a valuable asset to The Foundation. We didn’t know what she could do, what her true potential is. D-20958 hit SCP-5450 as strong as he could. SCP-5450 was shook, memories started flowing through her brain, she remember the terror that she once forgot. D-20958 was later found to be dead from two massive fist wounds. One on his stomach and one on his left chest.
SCP-5450 was later observed to be ignorant again, sitting in the corner with the face so pale she looks like a dead body. It was suspected that SCP-5450 experience PTSD in the process of this testing.
