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The D-Reaper is an entity that features in the Digimon universe.



The Reaper program was created in the late 1970s, allegedly by the United States Department of Defense, before Digimon and even the DigiGnomes, which appeared in the early 1980s. Though this is only set 30 years in the past, in the fast-growing Digital World it was comparable to the Cambrian period (542-488 Ma). It was designed so that whenever the number of digital lifeforms surpassed a set amount, it would delete them to return the Digital World back to a state of nothingness, in order to prevent the Digital World from being overloaded. However, when it was written, the Digital World had a very small RAM size, and while the network has grown exponentially, the D-Reaper's threshold is still based on that early, tiny figure. With nothing to do at the time, the D-Reaper program went dormant and remained deep within the recesses of the Net.

At about this time, the "Creeper" virus infected ARPANET, the network belonging to the Department of Defense. It was deleted by the "Reaper" program, which was allegedly created for only this purpose. In 1980, the Artificial Life research project "Tierra" began operations. However, the Reaper program causes mass genocide of Tierra's virtual lifeforms whenever they multiplied beyond a certain amount of memory. Throughout the 1980s, the SIGINT system known as "ECHELON" began operations under the leadership of the United States Department of National Security, which built communications bases in various nations across the globe. It is thought that the self-defense program used by ECHELON was a forerunner of the D-Reaper, or the program itself.

By the 2000s, the network had expanded exponentially. This created a huge influx of data into the Digital World, which the Digimon used to "Digivolve" and change. Though the system was large enough to handle this load, the Sovereign Azulongmon sensed that it could reawaken the D-Reaper, and with the help of the DigiGnomes he transformed the "Catalyst" program into the form of a Digimon, Calumon. Though this greatly slowed the growth and Digivolution of Digimon, it was not enough to stave off the D-Reaper, which soon reactivated. At the time, though, it was still in an extremely primitive state, and the Sovereigns attempted to find solutions before the problem became too huge.

The D-Reaper kidnapped Jeri in order to learn more about humans, creating its first Agent to lead it to the Real World. The main part of D-Reaper followed the Tamers to the Real World through the Hypnos system and immediately began to spread over Shinjuku, keeping the Kernel Sphere high between the two towers of the Hypnos building, with Jeri sealed inside as its source of energy due to her grief. Only the Biomerged and Mega-Level (like Beelzemon) Digimon were able to fight it until it evolved into the Mother D-Reaper. Eventually, the D-Reaper began a global attack on Earth's electronic communication and most of the Digital World was destroyed by the D-Reaper. It deemed that both races were inheritedly destructive and therefore unsuitable to live. It called the Cable Reaper from the Digital World to assist it in its work. However, through the combined effort of everyone in Operation Doodlebug, the D-Reaper was regressed back into its original, harmless state, no more complex than a simple calculator. MegaGargomon reversed the pull of the wormhole the Cable Reaper came through and was dragged back down by the Digimon Sovereigns, exceeding the speed-of-light, as the Mother D-Reaper and all the chaos got sucked into the hole.


The D-Reaper encountered by the Digimon Tamers was considerably different from the simple computer program it originated from. In the Digital World, the D-Reaper appeared in the form of a large, red chaotic mass of slime. Any data contacting the D-Reaper would immediately become absorbed and disappeared. Despite this, Digimon were able to fight the D-Reaper.

In the Real World, the D-Reaper still looked like a crimson mass. However, it could not absorb objects in the real world as quickly. It worked slower and adapted to the situation by studying the real world. Conventional weapons such as missiles appeared to have no effect on the D-Reaper. It also had the ability to assimilate technology from the Real World such as a camcorder that it absorbed when the military tried to study it.

To accomplish its goals, the D-Reaper utilizes a variety of forms known as "ADR's", or "Agents of the D-Reaper". Unlike humans and Digimon, ADR's are not individuals, and they all act according to the single consciousness of the D-Reaper. When they operate outside of the D-Reaper Zone, they are connected to it by red wires, similar in function to umbilical cords. When these cords are severed, the Agent becomes much weaker and easier to defeat, and weaker Agents will dissipate completely. Once the D-Reaper creates a new type of ADR, it will continue to use it until it is no longer useful and efficient. The various ADR's are named by the order they are created in, though they also possess codenames based on their appearance and function.


  • ADR-01: Jeri Type :



  • Digimon Tamers:

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