D-Reaper

"The D-Reaper has already won, foolish Digimon. The being called Jeri has taught the D-Reaper everything it needs to know about humans. Nothing they have can beat the D-Reaper. Nothing."

- The D-Reaper answering Calumon. The D-Reaper is the main antagonist in Digimon Tamers. It is a very powerful digital life-form that absorbs data from anything it touches, including the Real World (slower than in the Digital World, where it's far quicker). It can also absorb negative energy produced from humans.

The D-Reaper was first fought in the Digital World by the Tamers, who actually managed to halt its actions for a short time. However, once the children returned to their world, the Reaper followed them and started to consume the whole area of Shinjuku, Tokyo, beginning by the Tokyo Metropolitan Government Building area (headquarters of Mitsuo Yamaki's Hypnos project). It can't be harmed directly, as only a few objects and people can enter its bubble shield (called D-Reaper Zone) and see what's inside. The other reason is because the Reaper also holds Jeri Kato (Takato Matsuda's friend) as its prisoner and energy source. The D-Reaper was voiced by Yoko Asada in the Japanese version and Bridget Hoffman in the English version in the same fashion as Jeri herself, only deeper and computer-altered.

Character
The D-Reaper is cold and calculist, not caring about human or Digimon emotions or origins, as long as it provides development for its total mass. Even though it keeps Jeri prisoner, it shows no concern for her depression or loneliness, just technical curiosity. The Reaper also shows a slight curiosity on human emotions and feelings, as it constantly tries to analyse Jeri's emotions on Takato and sorrow on Leomon's death. It is also worth noticing that it never speaks of itself as "I" or "me", and constantly speaks in third person.

Despite all this D-Reaper is not inherently evil. It is merely fulfilling its original purpose of deleting anything more complex than the parameters for entities it was originally given.