In De substantiis Separatis Fr Stefan dealt with this question did Jesus have a guardian angel?
In Objection 1. Gregory the great said that Jesus is God, and it follow that because Jesus is God he doesn’t not need a guardian angel. Gregory the Great uses (Dn 7.10) where scripture says about the Son of God, “ten thousand upon ten thousand ministered to him.” Gregory concluded because Jesus is God and created the angel and that the angels serve him, it follows logically that Jesus did not need a guardian angel. Gregory citing the catechism writes, “Christ is the center of the angelic world. They are his angels…They belong to him, because they were created through him and for him.”(331) Does not the scripture say in Col,”for in him all things were created in heaven and on earth. visible and invisible, whether thrones or dominions or principalities or authorities-all things were created through him and for him.” If all the angel for the Son of Man and they belong to Him as servant to a king it would follow that Jesus did not need a guardian angel
Objection 2, Because Jesus is God he is the source of consolation, Jesus doesn’t need to receive consolation. Jesus is the source of consolation, Jesus does not need consolation from the angels?
Objection 3, If Jesus needed a guardian angel Jesus divinity would be sacrificed.
In answer to objection 1. Yes Jesus is God, but He became man. Scripture tells us that Jesus is like us in all things save sin. We read in the catechism of the Catholic Church, “From its beginning until death, human life is surrounded by their watchful care and intercession, Beside each believer stands an angel as protector and shepherd leading him to life.”(336) It is true that Jesus did not need a guardian angel because of his divinity. The Son of God is the creator of the angels and they serve him. However, it is also true that the son of God became like us in all things save sin. The catechism of the Catholic Church teaches that every human life has a guardian angel. Jesus became man therefore Jesus in His humanity had a guardian angel. Now we admit that we don’t know who Jesus guardian angel was or how he interacted with his guardian angel. We just argue that following from the logic of the Incarnation Jesus because he was man had a guardian angel.
In answer to Objection 2, Because Jesus is God is the source of consolation, Jesus doesn’t need to receive consolation from the angels. We argue that Jesus received consolation from Mary is His Mother at the cross. With regard to Jesus receiving consolation from the angelic world we look to scripture. We read in the solemn words of the Gospel of Mark after Jesus was tempted in the desert, “The Spirit immediately drove him out in the wilderness. And he was in the wilderness forty days, tempted by Satan, and he was with the wild beasts, and the angels ministered to him” (Mk 1:12-13) We read that the angels ministered to him. We read in book of Hebrews, “Are they (angels) ministering spirits sent forth to serve.” (Heb 1:14) When scripture says the angels ministered to him did not the angels bring forth some consolation unto Jesus. Saint Leo the Great says about the angels and struggles that the angels come to console us after the struggle. St Leo writes we win the crown of victory only after the struggle. Therefore the angels minister to Jesus after his temptation by Satan in the desert.
We also read in scripture when Jesus was in the garden in his hour of temptation we read, “Father, if thou are willing, remove this cup from me; nevertheless not my will, but thine be done. And there appeared to him an angel from Heaven strengthening him.(Lk 22: 42-44) Scripture says that the angel from heaven strengthen him. Jesus was truly helped by the angel.
Jesus was helped by the angels. Jesus wanted us to look to the angels for help and consolation.