In Acts 12:15 it is argued by some that at least one person may have thought Peter's angel might have talked like him. See the reference to Matthew 18:10 that speaks of guardian angels.
In Jewish tradition, guardian angels can take on human appearances. For example, in another discussion (see below), quotes were given by Frank Luke. He argued that in among rabbinic writings, Devarim Rabbah, the rabbinic commentary on Deuteronomy, has an angel take on the appearance of Moses.
Devarim Rabbah 2:29, “Bar Kappara said: an angel descended in the likeness of Moses and made him flee and the Egyptians thought that the angel was Moses.”
He also points out that Kohelet Rabbah, the commentary on Ecclesiastes, has an angel appear looking like Solomon and sitting upon his throne. Kohelet Rabbah 2:4; “At that time an angel descended in the form of Solomon and sat upon his throne.”
What is the general Christian view of the guardian angels of saints, now in heaven, appearing on earth?
Have any Protestant writers argued a view that some of the alleged apparition of saints in church history to be non human angels that have taken on the appearance of saints for some specific mission or reason?
The quotes above came from and is prompted by the discussion here, in which angels are described in Jewish history as sometimes appearing in the likeness of those that they are assigned to protect.