Global Merchant Services Lord, Knight, Serf, Merchant, Priest, Noble Woman, Peasant?

Lord, Knight, Serf, Merchant, Priest, Noble woman, Peasant? - global merchant services

I am a total ..
I have to do a couple of journal entries in one of the above to? ..
What would be the simplest and gives me a few things to do? ..
[Medieval]

Or give me an idea what to call one of the characters?