It would have to be fidus Achates. (theoritically, it can be used as synonym for faithful/ reliable friend) - it all depends on your perception if such expression suits your understanding (you could as well use alter idem if aspect of trust or reliability was of great importance)What do you think of using Achates for this? Could this type of usage been possible in classical?
Nicene Creed comes to mind....Hi all,
In English, the term "right-hand-(wo)man" stands in for "second-in-command," etc. Is there an analogous term in Latin? I know French allows for something like "bras droit," I wonder if the same is attested in Latin.
There is an older provenance, even further back than here.Nicene Creed comes to mind....
sedet ad dexteram Dei Patris omnipotentis,
Now is this the provenance of "right hand man?"