- Yes everyone knows each other's real name. They meet online under their alias but know each other offline as well. By everyone, I mean the Correctors.

- The alias is to keep their online identity separate from their offline life, as well as to protect them and their families, should hackers get past the Gvn's defenses for the Corrector.

- No, not at all. If your character is younger or newer to the group (though Sarah would be the newest so the least is known about her) then using more formal greetings is okay. But everyone should be on pretty close/casual terms at this point.