Per 
Item #: SCP-XXXX
Object Class: Safe
Special Containment Procedures: SCP-XXXX is to be contained in a Standard Secure Humanoid Containment Cell in Sector-11 at Site-██. SCP-XXXX is to be maintained inside containment cell at all times unless transportation is authorized by Doctor █████.
No video surveillance or optical tools are to be used. Instead, SCP personnel are to use motion sensors and laser detectors to ensure SCP-XXXX is present inside the cell.
Following Incident XXXX-A, only up to three (3) staff members are to enter SCP-XXXX's containment cell. Eye contact with the entity is discouraged.
SCP-XXXX is to be fed one (1) kilogram of uncooked animal meat on a weekly basis. Feeding usually takes between thirty (30) and fourty (40) minutes, after which SCP-XXXX falls into a sleep-like state.
In the event that SCP-XXXX becomes hostile, sedation is to be administered via ███████-12 gas.
Description: SCP-XXXX is a humanoid female. Entity measures approximately 1.7m in height and appears to be between fourteen (14) and sixteen (16) years of age, though its real age is as of yet unverifiable. Subject is mostly devoid of pigmentation, with exception of a single vertical mark on its forehead. Hair reaches down to the lower back and is also devoid of pigmentation.
SCP-XXXX has mostly human facial features, with the exception of the eyes, ears and oral cavity.
SCP-XXXX has entirely black eyes which are entirely different from human eyes, with the entire retina being in focus. Subject possesses pointed ears, resembling fantasy elves.
Dentition consists of twenty two (22) teeth that greatly resemble the ones of a grey wolf (Canis lupus) in shape.
Genetic analysis have revealed a genetic makeup that is completely incompatible with any known living organism at the time of writing. Doctor ███ has proposed that the entity is of extraterrestrial origin.
Examination and X-ray scans have revealed that SCP-XXXX does not possess organs such as kidneys, liver and spleen. Stomach, intestines and lungs show minor signs of atrophy when compared to an average human. SCP-XXXX does not excrete any waste, nor does it show signs of gaining or losing weight.
Reproductive organs initially show no signs of alteration. Further analysis has shown that the entity does not ovulate.
SCP-XXXX appears to be undetectable by video and photo devices that capture its appearance. This effect has been observed to extend to mirrors as well, causing the impression that SCP-XXXX is not there.
SCP-XXXX is normally docile and cooperative, usually reacting positively to the presence of research personnel, especially Doctor █████. Subject has shown to react negatively to direct eye to eye contact, actively trying to avoid it. Maintenance of eye to eye contact for more than two (2) seconds may cause SCP-XXXX to become uncooperative or even hostile.
Subject has shown signs of higher brain functions and is considered sapient, having succeded in all problem solving tests attempted.
SCP-XXXX has been recorded emitting distinctive vocalisations that resemble chanting, usually during nighttime. Patterns found in speech suggest that SCP-XXXX is actually speaking in an as of yet unknown language. Communication was confirmed to be possible after SCP-XXXX has shown the capacity to understand voice tones.
Permission to attempt teaching SCP-XXXX the basics of the English Language has been requested by Doctor █████.
Addendum 1: Discovery
SCP-XXXX was discovered during the investigation of a missing 19 year old male named ████ ███████, last seen in the city of ███████, ██████. Local authorities have found SCP-XXXX inside an isolated cave, located ██ kilometers away from the city's broders. SCP-XXXX was put into Foundation custody with little resistence.
Class A amnestics were administered to local personnel involved in the incident that led to SCP-XXXX's discovery.
Due to its docile nature and initial cooperation, SCP-XXXX has been classified as Safe.
Test A - Date: ██/██/20██
Subject: SCP-XXXX
Procedure: SCP-XXXX is introduced to the following objects: an apple, a peach and a candy bar.
Results: Subject does not acknowledge either objects and continues pacing around containment cell.
Analysis: SCP-XXXX has shown signs of physical hunger, though did not seem to even acknowledge what was given as food. Doctor █████ has theorised that the entity is a carnivore. Additional tests are to be performed.
Tests B, C, D - [DATA LOST]
Test E - Date: ██/██/20██
Subject: SCP-XXXX
Procedure: SCP-XXXX is to be introduced to a common rat (Rattus norvegicus)
Results: SCP-XXXX approaches the animal and proceeds to [DATA EXPUNGED] for several minutes before terminating the animal. Consumption of the newly deceased rat is followed by SCP-XXXX falling unconscious for one (1) hour.
Analysis: Doctor ████ initially positioned against the procedure, especially after the last test. SCP-XXXX seems to be indeed carnivorous, as initially theorised.
