That Satan IS real in the bible doesn’t automatically necessitate an ethereal being…
Yes it does. The reason is that when a proper name is used in conjunction with personal pronouns such as he and you to stand in place of the proper name…you have an actual being.
Jesus said “If Satan casts out Satan then HE is divided against HIMSELF.”
Matt 12:26, Mark 3:26, Luke 11:18
Peter is a case in point ( Mt 16:23 ).
Jesus rebuked Peter by calling out Satan who was in fact sifting Peter as wheat to see if he could find something in Him to use as a betrayal of Jesus. Jesus prayed for him that his faith would not fail.
Peter in that case was reacting with carnal defiance against Jesus declaration of his impending death. (Luke 22:31-32) Peter was being tempted by selfish ambition and greed. Peter imagined If Jesus died then he would not have his big throne upon which to rule in the coming Kingdom. There was a lot at stake for Peter because Satan had been sowing beautiful vanities in his mind.
Satan entered into Judas (Luke 22:3) instead and the conspiracy commenced.
A biblical satan however was anyone in opposition… even Yahweh himself via his angel was a satan in opposing Balaam ( Num 22:22; 32 ).
That is an exploitation of a linguistic coincidence to make an otherwise unsubstantiated claim.
In Hebrew MANY names were derived from common words or phrases.
Jacobs name meant supplanter and deceiver. His name was used as a common verb. See Str. H6117 Aqab. To supplant, to catch the heel. Yet in the context of identifying the Son of Isaac Aqab was a proper noun indicating a man.
That single isolated text providing a Hebrew root word which also formed Satans proper name is insufficient to dispose of the overwhelming personification of an actual being both in the OT and the NT.
Furthermore if satan were merely a quality of character or particular course of action only, then Jesus own words become absurdities. Jesus said that hell was prepared for the devil (diabolos) and HIS angels. This reference by the Messiah to a ruler/leader of a host of evil angels is corroborated in multiple places by prophets and apostles. Paul spoke of warring not against flesh and blood but instead a hierarchy of celestial powers aligned by rank together in evil purpose (Eph 6:12).
Isaiah 14:12 reveals clues about Satans previous identity as Lucifer the angel of God.
See also the Prince of Persia resisting the angel sent to Daniel. (Dan 10) Who can resist an angel? Another angel. The Prince of Persia is a title for an evil angel operating in Satans world kingdom. He was organized and delegated jurisdictions. In the same way Michael was called the Prince of Daniels people Israel.