Per 
Site Director
Dr. Allan J. McInnis
Research Head
Dr. Jefferson Stevens
Assigned MTF
Eta-11
Assigned MTF
Eta-11
Special Containment Procedures:
SCP-4211 is to be contained inside a 10x10 containment cell with 4 (four) toggleable UV lights individually on each ceiling side of the chamber. No regular light is permitted to be present in the chamber. During entry of the chamber, a noise at 9.432 Hz is to be played by an automatic process until the access door leading into SCP-4211's containment chamber has been closed and locked. During a power outage, the chamber access door must be completely locked before full power outage by detecting drops or surges in electrical output of the facility power grid. No personnel is permitted to remain within the chamber for over 50 minutes without total noise-canceling gear, unless permitted by Level 3 or higher clearance personnel. During testing, personnel are to take turns listening to the conversation to prevent spread of memetic effects. Personnel that have been exposed to SCP-4211's speech for 1 hour are to immediately be removed from its vicinity and taken to a therapeutic session, and reclassified to E-Class until further notice.
Description:
SCP-4211 is an invisible, 6'6" feet tall person that appears to be enacting in small talk with the closest person in visual contact, with no discernable gender. It will become visible under artificial UV light, although. It appears to have innate knowledge of the weather and other statistics or topics that may be mentioned during these small talks. It never appears to run out of topics, and has a great sense of humor, sarcasm and particularly irony, which make conversations with the anomaly highly entertaining and interesting. It has a 20th century British vocabulary and accent, claiming to have been born in 1938 in Greenwich, named "Thomas McDuberry" and the brother of Sir Kneverbeen, although there is no record of a Thomas McDuberry with these specifications.
In response to aggressive and loud replies of its partner, particularly the phrase 'Shut up!', it will respond with "Please, may you stay calm? We want to keep this conversation light-hearted and quiet.", or something similar. When the person it is talking to repeatedly expresses aggressive and loud speech towards it, it will respond with "Restrain thy tongue, dearest partner! You are acting very childish!", or, once again, something similar. It has a greater disliking to noises emitted at exactly 9.432 Hertz, repelling it from its source.
When its partner is exposed to SCP-4211's speech for 1 hour, they will begin to experience the growing urge to engage small talk with other people to spread its effects or, alternatively, if there are no people to listen to SCP-4211 itself, using the exact same language type, accent, and types of humor, sarcasm and irony. After 12 hours after initial exposure, will begin to lose the ability to act independently, and no longer be able to stop talking to others, aswell as the ability to express language violently and aggressively unless met with aggressive behavior aswell. After 24 hours, the victim will no longer breathe, and die due to lack of oxygen, not before losing the ability to speak at all.
Item is designated nuntii, potissimi, Object, Humanoid.
Note: This is a simple series I want to write. I do not want to post any of these to the main site. This is simply a hobby.