If maybe, for some reason, you are looking for the bible character who is said the archenemy of God, see Devil or Satan.
Antônio Aparecido Firmino (born in Jundiaí, date unknown), better known as Toninho do Diabo (Tom the Devil), is an alleged Brazilian religious, who identifies himself as a disciple of the devil, and calls itself the Ambassador of Lucifer on Earth and is therefore considered by the media as one of the greatest leaders of Brazil Satanists.