Boris seems to bring either fear or hatred from anybody who knew him at one point of history. For instance, while Kai, Tala, Spencer, Bryan and Ian display much loathing towards the man, younger kids such as Alexander are frightened by him and do anything he orders them to do. In the manga, Boris was actually only a subordinate to Dr. Zagart, and both worked to learn more about holy beasts so Dr. Zagart could steal them and resuscitate his first son Zeo. Boris was also related to the Saint Shields, since they temporarily worked for the two men regarding the sacred beasts matter.
His name relates to "Volki Monastery", the Abbey, which emphasizes the fact he probably owns it.