Thread:Ashleyien/@comment-918376-20150707020140/@comment-918376-20150722234724

When Minori noticed was never specified in the light novel. It was just at some point before his sacrifice in volume 4.

My two theories about the older players: 1) They let it slip because they thought it wouldn't be too dangerous (their specific instructions were "don't die, because you'll have to return here from Akiba"/the people in the group were responsible enough to know when to retreat, or 2) they didn't bother reading status screens either, just had people say their names, classes, and levels.