Their identity isn't something we really know, but I'll explain it a little. You must not have found the laptops yet.

[And god, he has no idea if he'll have to explain what a laptop is again, so he'll leave context clues just in case.]

Everyone has one in their assigned house so that we can talk to each other, and see those quests. We're each assigned hexadecimal codes— colors— and the one giving out the quests is #FFFFFF, or white.

They put up quests but reply to nothing else. It's weird, and there's no trusting it, but it's the only lead we have.