A guardian angel is an angel that is assigned to protect and guide a particular person, group, kingdom, or country.
An angel, especially according to Abrahamic religions and Zoroastrianism, is a spiritual being superior to humans in power and intelligence.
Guardian Angels by Sensus Fidelium
Belief in guardian angels can be traced throughout all antiquity.
How to Meet Your Guardian Angel by Josie Grouse
The concept of tutelary angels and their hierarchy was extensively developed in Christianity in the 5th century by Pseudo-Dionysius the Areopagite.
Pseudo-Dionysius the Areopagite, also known as Pseudo-Denys, was a Christian theologian and philosopher of the late 5th to early 6th century, probably Syrian, the author of the set of works commonly referred to as the Corpus Areopagiticum or Corpus Dionysiacum.
Christianity is an Abrahamic monotheistic religion based on the life and teachings of Jesus Christ.
The theology of angels and tutelary spirits has undergone many refinements since the 5th century.
Theology is the critical study of the nature of the divine.
Belief in both the East and the West is that guardian angels serve to protect whichever person God assigns them to, and present prayer to God on that person's behalf.
In monotheism, God is conceived of as the Supreme Being and principal object of faith.