If you read the writings of the saints, many of them have deep relationships with guardian angels. It’s not a stretch to think that we all have them, and it’s not a stretch to think that they physically manifest themselves to accomplish a particular task.
If you’re looking for purely Biblical references, they’re not just messengers-- they’re also servants and guardians.
One of the biggest bits will be in Matthew 18, where Jesus is talking about how if you lead a child who believes in him astray, that it’s better for you to be thrown into the ocean with a millstone-- it goes on to mention:
10 “See that you do not despise one of these little ones. For I tell you that their angels in heaven always see the face of my Father in heaven.
So the use of the possessive “their angels” is interesting.
And, of course, there’s Hebrews 13:
1 Keep on loving one another as brothers and sisters. 2 Do not forget to show hospitality to strangers, for by so doing some people have shown hospitality to angels without knowing it.
Offhand, it can first be figured to be a reference to Genesis 18… Abraham notices some travelers, invites them to his place, washes their feet, has Sarah make them some bread, and is generally hospitable. But if Abraham was the only person in the history of the world who had ever encountered an angel, wouldn’t it make sense to refer to him specifically, rather than the vague “some people”?
And you have the entire book of Tobit, where Raphael was not a guardian angel per se, but was sent to answer the prayer of Sara, and assisted Tobias during his travels. He’s definitely fulfilling a servant role, rather than that of a messenger.
And you also have the scene in Acts 12, where Peter is freed from prison by an angel. Was it a random angel, acting as a servant of God? Or was it his guardian angel, who was allowed to accomplish this task for him? It’s not clear, but it’s another instance where an angel is permitted to manifest and accomplish x on behalf of an individual, before disappearing. But if you’ll read it closely, you’ll notice that the people Peter went to thought he had a guardian angel.
And while I was copying that passage, I noticed the next part had a smiting-angel in it. So yes… Biblical angels have a much bigger role to play than merely being messengers.
1 It was about this time that King Herod arrested some who belonged to the church, intending to persecute them. 2 He had James, the brother of John, put to death with the sword. 3 When he saw that this met with approval among the Jews, he proceeded to seize Peter also. This happened during the Festival of Unleavened Bread. 4 After arresting him, he put him in prison, handing him over to be guarded by four squads of four soldiers each. Herod intended to bring him out for public trial after the Passover.
5 So Peter was kept in prison, but the church was earnestly praying to God for him.
6 The night before Herod was to bring him to trial, Peter was sleeping between two soldiers, bound with two chains, and sentries stood guard at the entrance. 7 Suddenly an angel of the Lord appeared and a light shone in the cell. He struck Peter on the side and woke him up. “Quick, get up!” he said, and the chains fell off Peter’s wrists.
8 Then the angel said to him, “Put on your clothes and sandals.” And Peter did so. “Wrap your cloak around you and follow me,” the angel told him. 9 Peter followed him out of the prison, but he had no idea that what the angel was doing was really happening; he thought he was seeing a vision. 10 They passed the first and second guards and came to the iron gate leading to the city. It opened for them by itself, and they went through it. When they had walked the length of one street, suddenly the angel left him.
11 Then Peter came to himself and said, “Now I know without a doubt that the Lord has sent his angel and rescued me from Herod’s clutches and from everything the Jewish people were hoping would happen.”
12 When this had dawned on him, he went to the house of Mary the mother of John, also called Mark, where many people had gathered and were praying. 13 Peter knocked at the outer entrance, and a servant named Rhoda came to answer the door. 14 When she recognized Peter’s voice, she was so overjoyed she ran back without opening it and exclaimed, “Peter is at the door!”
15 “You’re out of your mind,” they told her. When she kept insisting that it was so, they said, “It must be his angel.”
16 But Peter kept on knocking, and when they opened the door and saw him, they were astonished. 17 Peter motioned with his hand for them to be quiet and described how the Lord had brought him out of prison. “Tell James and the other brothers and sisters about this,” he said, and then he left for another place.
18 In the morning, there was no small commotion among the soldiers as to what had become of Peter. 19 After Herod had a thorough search made for him and did not find him, he cross-examined the guards and ordered that they be executed.
Code:
Then Herod went from Judea to Caesarea and stayed there. 20 He had been quarreling with the people of Tyre and Sidon; they now joined together and sought an audience with him. After securing the support of Blastus, a trusted personal servant of the king, they asked for peace, because they depended on the king’s country for their food supply.
21 On the appointed day Herod, wearing his royal robes, sat on his throne and delivered a public address to the people. 22 They shouted, “This is the voice of a god, not of a man.” 23 Immediately, because Herod did not give praise to God, an angel of the Lord struck him down, and he was eaten by worms and died.
24 But the word of God continued to spread and flourish.