Zyn And Karve
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Close-up image of SCP-3879's tongue. It is noted that the saliva produced by the individual takes on a distinct faint orange hue.

Item #: SCP-3879

Object Class: Euclid

Special Containment Procedures: SCP-3879 is to be contained in a standard humanoid containment cell. All furniture within the cell is to be constructed of corrosion-resistant materials. Meals (as specified by the on-site dietitian) are to be provided daily via delivery drone. Additional amenities, including leisure books and snack food, may be provided for good behavior as considered appropriate by the research team assigned to SCP-3879.

SCP-3879 is to receive daily academic instruction for four hours each weekday, from a rotating roster of six Level-2 research personnel assigned to the case as short-term tutors. Curriculum and individual work assignments are to follow Australian grade level standards, with supplementary elective activities (e.g., music, creative writing, figure drawing) offered at researcher discretion. College-level material may be offered when SCP-3879 exhibits willingness to proceed with higher level education.

A Foundation psychologist is to meet with SCP-3879 once a week at minimum, to gauge personal development and trauma recovery progress. Outside of these meetings, access to SCP-3879's containment cell requires Level-3 authorization and written permission from the lead researcher of the SCP-3879 project.

Protective clothing must be worn while within SCP-3879's containment area. A cabinet near the entrance to SCP-3879’s cell has been stocked with a set of corrosion-resistant suits and masks.

Description: SCP-3879 is a human male of Asian descent, with apparent age of 17 years. SCP-3879 demonstrates a number of atypical behaviors, including preferring to sleep at a desk rather than a bed, and spending most of its time stationed in a corner of its cell reading while curled into a fetal position.

SCP-3879 possesses a bodily composition similar to that of nonanomalous humans, with two primary anomalous traits: SCP-3879's body does not appear to age, and various bodily fluids produced by SCP-3879 contain low amounts of acidic substances. When SCP-3879 is frightened or injured by a visible stimulus, it will reflexively spray highly concentrated gastric acid1 from its mouth in the direction of said stimulus.

SCP-3879 has been noted to possess a high level of environmental sensitivity and will often exhibit symptoms of anxiety; these traits lead to a high likelihood of everyday occurrences triggering its involuntary anomalous property. However, SCP-3879 has frequently been observed attempting to redirect the acid it produces, to avoid harming people in the vicinity.

The farthest recorded distance of acid sprayed by SCP-3879 is 6 meters. The acid itself, while chemically identical to non-anomalous gastric acid, is strong enough to corrode most organic and inorganic matter. SCP-3879 itself reports suffering pain2 when its anomaly is triggered, stating that the stomach and throat pain makes it feel "miserable".

Regular communication and psychotherapy are believed to improve SCP-3879's cooperation with Foundation research staff, though SCP-3879 typically reacts with little enthusiasm to attempts to build conversational rapport. Currently, the primary requests made by SCP-3879 for containment amenities have all been related to finishing its education; SCP-3879 seems to respect its tutors the most compared to other staff it interacts with.

Addendum—Discovery: Upon initial Foundation acquisition, SCP-3879 identified itself as ██████ ███, an international (foreign exchange) student enrolled at ██████ High School of Melbourne, Australia. SCP-3879 previously had attended █ other high schools, never remaining at one site for more than three months. School behavioral records indicated that while a diligent and well-mannered student, SCP-3879 found difficulty making friends and was frequently a target of bullying.

SCP-3879's history of school transfers was noted to correspond exactly to frequent incident reports of unusual injury occurring in several different Melbourne high schools from ██/██/████ to ██/██/████. All cases involved student victims with bodily injuries exhibiting corrosion of various degrees. The most recent incident involved the death of a female student, with the local media falsely attributing the accident to have been the result of an emotional dispute between SCP-3879 and the victim.

During the location transfer from his host family's residence to a nearby Foundation site, SCP-3879 was noticeably taciturn and refused to respond verbally to communication. The single exception was thanking personnel when provided food to eat during the journey.

Addendum—Interview logs: Due to SCP-3879's emotional state affecting the manifestation of its anomaly, regular interviews were implemented in lieu of experimental testing. SCP-3879 is noted to prefer conversing in English, though that is not its native language.


As of ██/██/████, SCP-3879 is rapidly becoming more fluent in English, and has completed study material for several university-tier science courses. Discussion is underway regarding allowing SCP-3879 limited access to Foundation research3 pertaining to anomalous biology, in the hopes of it finding a means to neutralize its harmful effects.

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Co-authors: Karve, Zyn