The original Random Audience Members were actually members of the audience to Ares' Colosseum showcased battles between heroes of the NeS. But after the original colosseum was destroyed the audience members all left along with the NeS Heroes and continued to watch their exploits as they ventured around the globe. In time the audience members were considered to be watching the events of the Story like a play.
Random Audience Members are normally nondescript individuals that will speak up from the audience to comment on the Story or Characters. Though not always, the R.A.M.s will often point out some logical flaw to the Story content and will often then be silenced one way or another[NeS1 1]. They would sometimes be taken as Readers, fulfilling a similar role[NeS1 2].