What is the best way to think of FM's, that they represent the "group" that is in charge?

For example, with Rome, I'm trying to think of ways to role play them. It is hard to think of them as the "senate" because of the way the office triggers work. So they seem to be only a small part of the senate, yet, they are in complete control of the Romans.

Or should I look at a "consul" as a symbol for many consuls, so each FM is really a group?

How do you think of FM's of Rome?


Also for the modders out there, can you help me out at the following link, https://forums.totalwar.org/vb/showthread.php?t=123180?

-Apple.