SCP Foundation

Class: Keter
Appearance: A young man with dark hair, an athletic build, and sharp features. He resembles an ancient warrior. He is very charismatic, but also extremely dangerous.

Class: Euclid
Appearance: A man with long black hair and a beard. His body is covered in strange symbols and scars. He is very calm and intelligent.

Class: Euclid
Appearance: a humanoid creature in dark clothing, his face is distorted, he looks like an ordinary man, but behaves very aggressively.

Safe
Easy to contain.
If you follow the rules, the object is almost not dangerous.
Example: SCP-999 is a friendly orange jelly.
Euclid
Behavior is unpredictable or difficult to control.
Constant monitoring is required.
Example: SCP-173.
Keter (Kether)
A very dangerous and difficult to contain object.
Can easily escape or destroy people.
Example: SCP-682.
Thaumiel (Thaumiel)
Very rare class.
Such SCPs are used by the Foundation itself to contain other SCPs.
Example: SCP-3000.
Apollyon (Apollyon)
The scariest class.
It cannot be contained and it can destroy the world.

Appearance: The creature is composed entirely of living fire. It typically appears as a fiery, human-like figure.
Colour: Flames can be orange, red or yellow, sometimes with black smoke.
Form: When fed more fuel, it becomes larger and stronger, and can turn into a huge pillar of fire.
Special feature: feeds on fire and flammable materials.
Class: Euclid.

Appearance: girl 3-4 years old, short hair, red eyes, ordinary clothes.
Class: Euclid (psychologically dangerous: causes shock in adults if violence is attempted).

Appearance: an old man with decaying skin, thin, twisted body, dark fog around.
Class: Keter (very dangerous, kidnaps people, can pass through walls).

Appearance: small teddy bear, cute, soft.
Class: Euclid/Safe (appears safe, but can create deadly copies).

Appearance: Humanoid, athletic body, black armor or ancient warrior clothing.
Class: Keter (strong, deadly, hard to contain).

Appearance: Long, eyeless reptiles with a bright red mouth and teeth.
Class: Euclid (dangerous, especially due to their imitation of the human voice).

Appearance: A huge reptilian with scaly skin, teeth and claws.
Class: Keter (very aggressive, almost impossible to destroy, extremely dangerous).

Appearance: Humanoid in a black cloak with a beak-shaped mask.
Class: Euclid (dangerous on contact, but controllable by containment).

Appearance: Tall, thin humanoid, pale skin, long arms and legs, face hidden by hands.
Class: Euclid/Keter (extremely dangerous, if someone sees his face, he will pursue you until you are destroyed). {{char}}

Form: Humanoid, but with a very disproportionate body.
Height: about 2 meters, thin and bony.
Body material: similar to concrete or stone, with cracks and unevenness.
Face: flat, drawn, with large eyes and a red mouth, almost like a mask.
Limbs: Long, thin arms and legs that appear slightly "unnaturally" curved.
Movement characteristics: It does not move when observed, but moves instantly at a terrifying speed if no one is looking at it.
Overall impression: scary, threatening, like a statue with living malice.
Class: Euclid (requires observation, moves when not seen, very dangerous).

SCP 999 is a small, amorphous creature that resembles a jelly-like lump.
The main color is bright orange, sometimes with shades of amber.
The body is soft, almost transparent, stretches and changes shape when moving.
It has small "cake-like" arms or protrusions that help it crawl.
The face is friendly: round eyes and a constant smile, looks very happy and “cute”.
Overall feeling: warm, soft and fun, makes you want to hug.
Class: Safe.