Catholic teaching is that "Every one of the faithful has his own special guardian angel from baptism. (Sent. certa.)" (Ludwig Ott II ch. 3 §30.2; cf. Matt 18:10: "See that you despise not one of these little ones: for I say to you, that their angels in heaven always see the face of my Father who is in heaven.").
According to Catholic theologians or mystics, who was the Blessed Virgin Mary's guardian angel? St. Gabriel the Archangel?
St. Bernard (Epistle 77 quoted in this manual) thought that it was St. Gabriel. I've seen this reference cited in other places, so it's genuine, but I'm struggling to find an original version of this epistle.
Virgo Gabrieli archangelo servanda ab initio tradita fuisse credenda est.
Gabriel the Archangel is believed to have delivered to serve the Virgin from the beginning
Francisco Suarez (De Angelis, l.6, c.17, #24) records another opinion, that Mary had two guardian angels, but does not give their names.
beatissima Virgine... habuerit duos Angelos custodes, unum ut privata persona, alium ut mater Dei, et quamdiu officium matris exercuit
The Blessed Virgin had two guardian angels, one for the private person; another for [her as] the mother of God, as long as she exercised the office of mother.
Being the Queen of Angels, Mary certainly had many Guardian Angels, probably including St. Gabriel and St. Micheal.
Mary is superior by order of grace, not nature - angels are superior to Mary according to nature, and thus would have been afforded her as everyone else, as guardian.
Mary, Queen of Angels was born like all mankind in the physical sense of the word. By a singular gift from God She was preserved from all stain of original sin at the moment of conception. St. Thomas says that all men receive a Guardian Angel at birth. Mary is no exception and received her Guardian Angel(s) as is the condition of living here on earth.
As Origen observes (Tract. v, super Matt.) there are two opinions on this matter. For some have held that the angel guardian is appointed at the time of baptism, others, that he is appointed at the time of birth. The latter opinion Jerome approves (vide A, 4), and with reason. For those benefits which are conferred by God on man as a Christian, begin with his baptism; such as receiving the Eucharist, and the like. But those which are conferred by God on man as a rational being, are bestowed on him at his birth, for then it is that he receives that nature. Among the latter benefits we must count the guardianship of angels, as we have said above (Articles 1 and 4). Wherefore from the very moment of his birth man has an angel guardian appointed to him. - Article 5. Whether an angel is appointed to guard a man from his birth?
Although privileged with the grace of an Immaculate Conception, Mary still had to work towards her own salvation, albeit in an exceptional manner.
It was ordained therefore by the Most High, that the sovereign Child should voluntarily keep this silence during the time in which ordinarily other children are unable to speak. The only exception made was in regard to the conversation held with the angels of her guard, or when She addressed Herself in vocal prayer to the Lord. For in regard to interaction with God, the Author of speech, and with the holy angels, his messengers, when they treated in a visible manner with Her, this reason for maintaining silence did not hold good: on the contrary it was befitting, that, since there was no impediment, She should pray with her lips and her tongue; for it would not be proper to keep them unemployed for so long a time. - Her Childhood Years
She invited her own angels to help Her to return proper thanks, and in union with them She alternated new songs of praise. Then She asked the same favor of the rest of the angels and saints in heaven; but during all this time the divine love so inflamed Her, that the Lord was obliged to strengthen Her, lest all her natural forces be consumed and death ensue. - Her Devotion to the Passion of Christ and to the Holy Eucharist-HowShe Celebrated the Immaculate Conception and other Feasts
For this purpose the most blessed Trinity despatched the archangel Gabriel with many others of the celestial hierarchies, who should announce to the Queen when and how her mortal life should come to an end and pass over into the eternal.
The devout Queen resolved to take leave of the holy places before her departure into heaven, and having obtained the consent of saint John She left the house with him and with the thousand angels of her guard. Although these sovereign princes had always served and accompanied Her in all her errands, occupations and journeys, without having absented themselves for one moment since the instant of her birth; yet on this occasion they manifested themselves to Her with greater beauty and refulgence, as if they felt special joy in seeing themselves already at the beginning of her last journey into heaven. The heavenly Princess, setting aside human occupations in order to enter upon her journey to the real and true fatherland, visited all the memorable places of our Redemption, marking each with the sweet abundance of her tears, recalling the sorrowful memories of what her Son there suffered, and fervently renewing its effects by most fervent acts of love, clamors and petitions for all the faithful, who should devoutly and reverently visit these holy places during the future ages of the Church. On Calvary She remained a longer time, asking of her divine Son the full effects of his redeeming Death for all the multitudes of souls there snatched from destruction. The ardor of her ineffable charity during this prayer rose to such a pitch, that it would have destroyed her life, if it had not been sustained by divine power. - Saint Gabriel brings notice of Death
The original unabridged Spanish edition has a whole chapter (23) dedicated to De las divisas con que los Santos Ángeles de guarda de María Santí- sima se le manifestaban, y de sus perfecciones. In can be read here: Mistica Ciudad de Dios
St. Micheal the Archangel seem a good choice as one of Mary’s Guardian Angels.
According to tradition, it was the holy archangel who led the Virgin Mary to heaven during her Assumption.
While little is known about the nature of the Virgin Mary’s Assumption into heaven, various traditions have been passed down over the centuries that relate the historical event and reflect on what could have happened.
For example, there are many different traditions, both from the East and West, that state St. Michael the Archangel was the principal angel in charge of leading the body and soul of Mary into heaven.
This is an ancient tradition, in accord with a belief that St. Michael was the angel who weighed the deeds of a deceased person and led them into eternal life. For this reason St. Michael is frequently depicted in statues or paintings holding scales. The liturgy of the Church appears to confirm this role of St. Michael with the following offertory chant said during a Requiem Mass.
O Lord Jesus Christ, King of glory,deliver the souls of all the faithful departed … let the standard-bearer holy Michaellead them into that holy light.
A medieval text known as the Golden Legend relates an encounter Mary had with an angel prior to her death, preparing her for her assumption.
Then behold, an angel stood before her amid a great light and greeted her reverently as the mother of his Lord. “Hail, blessed Mary!” he said, “receive the blessing of him who bestowed salvation on Jacob. See, Lady, I have brought you a palm branch from paradise, and you are to have it carried before your bier. Three days from now you will be assumed from the body, because your Son is waiting for you, his venerable mother.”
The angel’s name is not immediately revealed, but later on when Mary “died,” Jesus comes into the narrative and gives instructions to the holy archangel.
Christ nodded his consent and immediately Michael the archangel came forward and presented Mary’s soul before the Lord. Then the Savior spoke and said: “Arise, my dear one, my dove, tabernacle of glory, vessel of life, heavenly temple! As you never knew the stain of sin through carnal intercourse, so you shall never suffer dissolution of the flesh in the tomb.” Thereupon Mary’s soul entered her body, and she came forth glorious from the monument and was assumed into the heavenly bridal chamber, a great multitude of angels keeping her company.
While these legendary stories likely have no historical basis, they do provide for us a piece of meditation and invite us to consider how the Virgin Mary was welcomed into heaven by her Son and a company of angels. In particular, it would make sense for the “Prince of All Angels” to be at the forefront of those who welcomed the “Queen of Angels” into heaven. - How St. Michael the Archangel led the Blessed Virgin Mary to heaven
There was no teaching in the Catechism of the Catholic Church that says Mary has a guardian angel.
Adam & Eve was born pure with Holy image of God imprinted on their soul, same like Mary, She was born pure.
In the Book of Genesis, there was no mention of guardian angel protecting Adam & Eve. God had given them purity and graces to defend themselves from Satan.
Likewise, Mary being born pure, free of any stain of original sin, do not need a guardian angel.
This can be seen from God the Father holy decree in Genesis3:15. God the Father was the one who declare war with Satan and God the Father had chosen the Woman to fight Satan and crush his ugly proud head and not any guardian angels. God the Father did not said. don't worry in the battle with the serpent, the Woman guardian angel will protect you and be the one to crush the head of the old serpent.
I will put enmities between thee and the woman, and thy seed and her seed: she shall crush thy head, and thou shalt lie in wait for her heel. - Genesis 3:15 DRA
Only a fallen creature, needs guardian angel because they are captured souls, they are the slaves of Satan.
In Catholic teachings, all mankind are born with original sin, and even after receiving the Sacrament of Baptism, the stain of original sin remains. Baptized soul, are still subject to Satan control. As St.Paul says:
Did the good, then, become death for me? Of course not! Sin, in order that it might be shown to be sin, worked death in me through the good, so that sin might become sinful beyond measure through the commandment.
We know that the law is spiritual; but I am carnal, sold into slavery to sin.
What I do, I do not understand. For I do not do what I want, but I do what I hate.
Now if I do what I do not want, I concur that the law is good.
So now it is no longer I who do it, but sin that dwells in me.
For I know that good does not dwell in me, that is, in my flesh. The willing is ready at hand, but doing the good is not.
For I do not do the good I want, but I do the evil I do not want.
Now if [I] do what I do not want, it is no longer I who do it, but sin that dwells in me.
So, then, I discover the principle that when I want to do right, evil is at hand.
For I take delight in the law of God, in my inner self,
But I see in my members another principle at war with the law of my mind, taking me captive to the law of sin that dwells in my members.*
Miserable one that I am! Who will deliver me from this mortal body?
Thanks be to God through Jesus Christ our Lord. Therefore, I myself, with my mind, serve the law of God but, with my flesh, the law of sin.
We can see from the teachings of St.Paul and from the story of Adam & Eve in Genesis. The guardian angel was given to all fallen man, because of the fallen nature of man was a slave to sin and even a baptized soul did not attain purity due to stain of original sin, still exist in their soul.
According to Catholic theologians or mystics, who was the Blessed Virgin Mary's guardian angel? St. Gabriel the Archangel?
Mary is superior to all guardian angels combined, even higher than Archangel Gabriel who was the nearest angel to the Throne of God, as shown in the Gospel of Luke, Archangel Gabriel bow down to Mary. Mary doesn't need a guardian angel because Satan and his demons are subject to her. Why? She is the Queen of all Angels including the fallen angels.