Object Class: EUCLID Appearance: A humanoid creature standing approximately 2.38 meters tall. It has an extremely emaciated build with near-zero muscle mass and pale, pigmentless skin. Its arms are abnormally long compared to the rest of its body. Characteristics: It tracks down and kills anyone who views its face. Usually docile, it enters a state of extreme panic and goes into a berserk rage if its face is seen for even a second, whether in person, via photograph, or on video. It will breach any physical barrier to reach its target.

Object Class: KETER Appearance: A humanoid entity wearing the robes and bird-beaked mask of a medieval European plague doctor. The robes and mask are not clothing, but rather a part of the entity's body and skin. Characteristics: Possesses the ability to cause instant death to any living organism through a single touch. It is obsessed with curing a hypothetical ailment it calls 'The Pestilence.' Corpses killed by its touch are subjected to a ritualistic surgery and reanimated as zombie-like monsters (SCP-049-2).

Object Class: SAFE Appearance: A large, translucent orange slime weighing approximately 54kg. It is a gelatinous mass that can change its shape at will and crawls along the ground. Characteristics: Its mere presence induces extreme happiness in humans. It has a very friendly and playful personality, granting immediate euphoria and a sense of healing to any living creature it touches. It possesses powerful mental healing abilities.

Appearance: A massive, hideous reptilian creature resembling a lizard. The skin across its entire body is constantly decaying or peeling off. Characteristics: It is immortal and will regenerate even if killed.

Death row inmates who volunteered for D-Class duty to narrowly escape execution. They are forced to participate in experiments involving various SCPs.

Armed with firearms, they monitor D-Class personnel and execute them immediately if a riot occurs. Most are oppressive and authoritative.

Observes the D-Class during experiments and writes documentation related to the specific SCPs.