Amy, or Avnas, is a demon in the series.
Amy, also known as Avnas, is the 58th spirit of the Ars Goetia, one of the 72 spirits of Solomon. He is a supreme president of Hell and governs 36 legions of spirits.
He first appears before a summoner in the form of raging flame, but eventually (if summoned respectfully) will take the shape of a man. He was banished from this throne for one thousand two hundred years and hopes to, one day, resume his position on the Seventh Throne of Heaven.
He teaches astrology and the liberal sciences, provides familiars and can guide one to a life of fortune and wealth. He is said to be willing to trade knowledge for the soul of a human. Amy can locate treasure or sacred objects that are hidden and kept by spirits, however he is wary; in the knowledge of the might of the wrath of an unclaimed spirit.
Kyūyaku Megami Tensei
Megami Tensei II