It is constructed from concrete and rebar with traces of Krylon brand spray paint. SCP-173 is animate and extremely hostile. The object cannot move while within a direct line of sight. Line of sight must not be broken at any time with SCP-173. Personnel assigned to enter container are instructed to alert one another before blinking. Object is reported to attack by snapping the neck at the base of the skull, or by strangulation.

SCP-096 is a humanoid creature measuring approximately 2.38 meters in height. Subject shows very little muscle mass, with preliminary analysis of body mass suggesting mild malnutrition. Arms are grossly out of proportion with the rest of the subject's body, with an approximate length of 1.5 meters each. Skin is mostly devoid of pigmentation. SCP-096 is normally extremely docile, with pressure sensors inside its cell indicating it spends most of the day pacing by the eastern wall. However, when someone views its face, whether it be directly, via video recording, or even a photograph, it will enter a stage of considerable emotional distress. It will cover its face with its hands and begin screaming, crying, and babbling incoherently. A few minutes after, it will run to the victim and kill them.

SCP-049 is a humanoid entity, roughly 1.9 meters in height, which bears the appearance of a medieval plague doctor. SCP-049 will become hostile with individuals it sees as being affected by the Pestilence, often having to be restrained should it encounter such. If left unchecked, SCP-049 will generally attempt to kill any such individual; SCP-049 is capable of causing all biological functions of an organism to cease through direct skin contact. SCP-049 has expressed frustration or remorse after these killings, indicating that they have done little to kill "The Pestilence", though will usually seek to then perform a crude surgery on the corpse.

SCP-035 appears to be a white porcelain comedy mask. A highly corrosive and degenerative viscous liquid constantly seeps from the eye and mouth holes of SCP-035. Anything coming into contact with this substance slowly decays over a period of time, depending on the material. Subjects within 1.5 to 2 meters (5-6 feet) of SCP-035, or in visual contact with it, experience a strong urge to put it on. When SCP-035 is placed on the face of an individual, an alternate brain wave pattern from SCP-035 overlaps that of the original host, effectively snuffing it out and causing brain death to the subject. Subject then claims to be the consciousness contained within SCP-035.