Any reason for "mo charaid" over "an caraid agam"?
Gaelic has two different types of possession, mo (inalienable possession) is generally used for family or in this case friends. There is a much more full explanation in the notes. https://www.duome.eu/tips/en/gd
The notes do not include friends as one of the inalienable subjects as far as I can see! This would be useful to add if "an caraid agam" is going to be rejected.
Yes, I find this confusing too, especially since husbands and daughters take an ___ agam!