“Do guardian angels exist?”
How many angels are there? We can’t be sure, but there are indications in the Bible that number is stratospheric. Hebrews speaks of “innumerable angels in festal gathering”. In Revelation, John writes of “many angels, numbering myriads of myriads and thousands of thousands”.
The Greek expression underlying the latter phrase may refer to vast numbers generally, or may refer literally to the number 10,000 times itself.