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Recovered daguerrotype of an instance of RPC-800, circa 1848.

Registered Phenomena Code: 800

Object Class: Gamma-Red

Hazard Types: h-sentient.png Sentient Hazard h-aggression.png Aggression Hazard h-transmutation.png Transmutation Hazard h-aquatic.png Aquatic Hazard

Containment Protocols: Due to the nature of RPC-800, the Authority has established a quarantine of residential areas in close proximity to Lake Okutadami, designated Area-800. Said residential areas have been populated with mannequins in order to prevent further advancement of RPC-800. All nearby residential areas have additionally been fitted with chain-link fences equipped with barbed wire and motion sensors. Security personnel, disguised as regional law enforcement, are to patrol the surrounding area.

In the event of RPC-800's manifestation, all security personnel are to maintain a distance of approximately 20 meters and observe the movement of RPC-800 until their subsequent withdrawal and demanifestation. Any observed instances of RPC-800-B are to be terminated by designated marksmen.

Description: RPC-800 is the collective designation for fourteen males of Japanese descent, individually designated RPC-800-1 through -14. Instances of RPC-800 are clad in traditional samurai armor consistent with that worn by the Matsudaira clan.1 RPC-800's primary method of communication is an unknown form of sign language; low-pitched grunts are additionally, although rarely, utilized.

RPC-800 currently inhabits the river network of central Japan, utilizing a sekibune2 vessel in order to navigate said system. Twelve instances, with two groups of six on opposite sides of the vessel's deck, generate movement via synchronized rowing. The remaining two instances serve as a helmsman and navigator. While exhibiting no deviations in its overall appearance, the vessel is immune to chemical or physical breakdown.

Approximately every two weeks, RPC-800 manifests near a tributary of the river network and proceed to search for any inhabited settlements. If no occupancy is observed, RPC-800 continues navigating until reaching an inhabited area. The direction in which RPC-800 travels is seemingly random, as instances appear to select and follow certain pathways based on impulse or guesswork. Upon sighting an occupied settlement, all instances proceed to disembark and invade it, searching for any occupants within the area.

During this time, RPC-800 instances typically brandish weapons originating from their respective time period3 to assist in their hunt. While hunting, RPC-800 only use the general semblance of the human body in order to recognize and target their victims. This has resulted in RPC-800 instances attacking and capturing various inanimate, human-shaped objects, including mannequins, training dummies, and statues.

RPC-800 target the non-vital regions of their victims in order to incapacitate or immobilize them. Once injured, the subject is bound and carried to the shoreline. After all potential subjects in the settlement are successfully captured, RPC-800 instances produce a series of large wooden barrels from their vessel. These barrels contain a luminescent chemical of unknown composition capable of altering the subject's morphology through unspecified processes.

All subjects are then forcibly immersed and sealed within the barrel's contents. After a period of two minutes, the seams of the barrel(s) rupture and release the mutated individual(s), henceforth referred to as RPC-800-B. RPC-800-B resemble various quadrupedal organisms, with a heavyset muscular frame and a thick, blue squamous hide. While RPC-800-B retains most of its original anthropomorphic features, its most notable changes are in its facial features, including a pointed snout, two sets of eyes, and lack of ears.

RPC-800-B typically assist RPC-800 during their attacks, with a total of five instances manifesting at a time. RPC-800-B proceed to inspect any items or individuals captured by RPC-800 and distinguish living from non-living "bodies"; any inanimate objects are promptly discarded. RPC-800-B's method of identification is the secretion of salivary fluids which are expectorated onto the subject/item. This produces a chemical reaction on organic surfaces, which then acts as a natural chemosignal.

Once finished, RPC-800-B immediately dematerialize. Instances of RPC-800 subsequently re-embark onto their vessel before sailing from the area and gradually demanifesting. Upon their next manifestation, RPC-800 exhibit an innate awareness if their prior location was successfully cleared of potential victims (living/non-living). This causes RPC-800 to manifest at the next tributary, further advancing them along the channel. Between manifestations, RPC-800 continue to appear at the same location if the settlement was previously restocked/repopulated.

Addendum 800-001: Archived Document

The following document was recovered from a journal belonging to Samuel Mills, a British government functionary who proceeded on a three month excursion to mainland Japan in 1848 for the purposes of observing the Tokugawa administration. Various entries referencing RPC-800 are documented, including observations detailing the instances' behavior previously unaccounted for by Authority researchers. A daguerreotype of an instance of RPC-800 was additionally discovered within the journal.

Addendum 800-002: Interview Log

The following audio logs were recorded on ██/██/20██, between Operative Hershel of the Authority Intelligence Agency and Kenta Iziwashi of the Japanese government. Following attempts to acquire evidence pertaining to the origins of RPC-800, the Authority delivered a query to the Japanese government to dispatch a functionary to meet at an undisclosed location after the discovery of archived documentation.

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