Eligor

According to the works of Johann Weyer in the 16th century, Eligos (also Abigor or Eligor) is a Great Duke of Hell, ruling 60 legions of demons. He discovers hidden things and knows the future of wars and how soldiers should meet. He also attracts the favor of lords, knights and other important persons. He is depicted in the form of a goodly knight, or as a ghostly spectre, sometimes riding a semi-skeletal (sometimes winged) horse, the Steed of Abigor, created from the remains of one of the horses of the Garden of Eden.

Eligor in The Case of the Toxic Spell Dump
Eligor was a demon who specialized in discovering hidden things. Thus, CBI agent Celia Chang summoned Eligor and his colleague Botis to discover the whereabouts of the kidnapped Judy Adler.