ビリユイ

Viluy is the 4th member of the Witches 5, named for the mineral viluite. In the anime, Viluy was handed the task of gathering pure hearts after Tellu's demise. To achieve this goal, she programmed all the computers at the Infinity Academy to extract the pure heart crystal of their users during a national practice exam. Additionally, she possessed the "Mosaic Buster" attack, which released a flurry of nano-robots from her wristband. In the manga, Viluy was the third witch to appear, before Tellu. She was ranked at Level 202 and led the Science Division of Infinity Academy under the alias of Yui Bidoh.