Viluy is not actually a human, she is really sort of a computer simulation. In the manga, Viluy is the third of the Witches5 to appear but the fourth of the Witches5 to appear in the anime. She disguises herself as the leader of the science class and the only girl that can actually beat Mizuno Ami's entrance test results into Mugen Gakuen. Viluy planned to release a special virus into the school computer network. It will remove all the students' pure hearts and bring them through the computer screen to her to turn them into the slaves of Master Pharoah 90. It was stated in the manga, Viluy was level 202 and her attack was "Mosaic Buster" which is about the equivilant to Sailormercury's attack "Aqua Mirage". Back to the anime, Ami, Haruka, and Michiru discover her plot and try to stop her, but she uses this special wrist device, called the "Motaiku Buster", to blast a computer virus into them. It begins to electrocute them. Haruka and Michiru manage to get a hang of themselves, overcame that virus and transformed into Sailoruranus and Sailorneptune. Then they attack Viluy, damaging her wrist device. Sailor Moon appears and attacks too, damaging Viluy's device even more. When Viluy tries to attack again, her virus backfires on herself, which caused her to destroy herself (what dumb luck). Viluy appeared only in one act in the manga in Tankubon 8, Act 27, Infinity 4.