[quote=@banjoanjo]
We could say that all the reserve students were emailed a list of fellow reserve students beforehand or something. Then our characters can coincidentally bump into each other, learn each others' names and realise that they're all reserves.
[/quote]

Actually, in Eisen's post, he mentions that he got a vague description of each of his team mates, but not their name or a photograph of them. I kind of like the possibility this idea holds.