When Aleph encounters Crowley, he is angry that Lucifer will not allow him to have Sabbaths (orgies involving demons) and takes this frustration out on Aleph in the form of Master Terion. He is eventually defeated.
Shin Megami Tensei IV
"The name of the beast that the mystic Aleister Crowley called himself. It refers to the beast that appears in the Book of Revelations. According to Revelations, Therion is the enemy of humanity, a beast with the power and authority of Satan. The beast is said to come from the sea, having seven heads and ten horns, a body like a leopard and legs like a bear. Another beast with lamb's horns is said to come from the earth, forcing man to worship the beast from the sea. Everyone must also bear the mark of the beast, the number 666, on their hand or forehead, or they cannot buy or sell goods."