Monitoring sprits, also know as  masquerading spirit, watcher, or gang stalkers are considered a malevolent entity that observes and tracks an individual’s actions. It’s often associated with:

Gathering information: These spirits are believed to collect information about a person’s life, habits, and vulnerabilities.
Negative influence: The information gathered is thought to be used to inflict harm, hinder progress, or create obstacles in the person’s life.
Various forms: Some beliefs suggest these spirits can take various forms, sometimes even appearing as animals or manipulating dreams.  Here are some Examples in the bible.

Ephesians 3:10 New International Version

10 His intent was that now, through the church, the manifold wisdom of God should be made known to the rulers and authorities in the heavenly realms,

Psalm 37:32 King James Version (KJV)

The wicked watcheth the righteous, And seeketh to slay him.

1 Peter 5:8  King James Version

Be sober, be vigilant; because your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour:

2 Corinthians 2:11

King James Version

11 Lest Satan should get an advantage of us: for we are not ignorant of his devices.

Ephesians 6:11

King James Version

11 Put on the whole armor of God, that ye may be able to stand against the wiles of the devil.

Other types of demons : python spirits, Delilah spirits, Jezebel spirits, marine spirits, Leviathans, Kundalini, Ahabs, etc familiar spirit

-Devil isn’t omnipresent can’t be everywhere at once, uses monitoring spirits. Deliah is a example of a monitoring spirit, she reported everything that Samson did to the Philistines