Satan

Angel of Light- Appears to be a friend.

Septuagint-

1 Chronicles 21:1 NASB95

Then Satan stood up against Israel and moved David to number Israel.

The name of Satan- is linked to adversary, enmity, hostility.

Job 1:6–7 NASB95

Now there was a day when the sons of God came to present themselves before the Lord, and Satan also came among them. The Lord said to Satan, “From where do you come?” Then Satan answered the Lord and said, “From roaming about on the earth and walking around on it.”

Revelation 12:9–10 NASB95

And the great dragon was thrown down, the serpent of old who is called the devil and Satan, who deceives the whole world; he was thrown down to the earth, and his angels were thrown down with him. Then I heard a loud voice in heaven, saying, “Now the salvation, and the power, and the kingdom of our God and the authority of His Christ have come, for the accuser of our brethren has been thrown down, he who accuses them before our God day and night.

Septuagint-

The Accuser of the Brethren- has been thrown.

Serpent, Devil, Satan all linked to “the accuser of the brethren.”

Septuagint-

Job 2:3 NASB95

The Lord said to Satan, “Have you considered My servant Job? For there is no one like him on the earth, a blameless and upright man fearing God and turning away from evil. And he still holds fast his integrity, although you incited Me against him to ruin him without cause.”

Job 1:6–7 NASB95

Now there was a day when the sons of God came to present themselves before the Lord, and Satan also came among them. The Lord said to Satan, “From where do you come?” Then Satan answered the Lord and said, “From roaming about on the earth and walking around on it.”

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Job 1:12 NASB95

Then the Lord said to Satan, “Behold, all that he has is in your power, only do not put forth your hand on him.” So Satan departed from the presence of the Lord.

Job 2:6 NASB95

So the Lord said to Satan, “Behold, he is in your power, only spare his life.”

Use of diabolos in every one those passages in the septuagint.

Matthew 4:1 NASB95

Then Jesus was led up by the Spirit into the wilderness to be tempted by the devil.

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Psalm 108:6 NASB95

That Your beloved may be delivered, Save with Your right hand, and answer me!

Psalm 109:6 NASB95

Appoint a wicked man over him, And let an accuser stand at his right hand.

1 Timothy 3:6 NASB95

and not a new convert, so that he will not become conceited and fall into the condemnation incurred by the devil.

Ephesians 6:11 NASB95

Put on the full armor of God, so that you will be able to stand firm against the schemes of the devil.

Matthew 13:39 NASB95

and the enemy who sowed them is the devil, and the harvest is the end of the age; and the reapers are angels.

Matthew 4:8 NASB95

Again, the devil took Him to a very high mountain and showed Him all the kingdoms of the world and their glory;

Satan incites in both passages.

1 Chronicles 21:8 NASB95

David said to God, “I have sinned greatly, in that I have done this thing. But now, please take away the iniquity of Your servant, for I have done very foolishly.”

Satan is a secondary cause but not a friend.