Who is online

The realm itself says who is logged in: it marks a character online when the game server accepts the session and clears it when the session ends. This page reads that flag, it does not watch traffic.

0 characters online.

The realm is answering and says nobody is logged in on it right now.

Side is this site's reading of a race: the realm's character table has no side column, so an unfamiliar race is counted and named by number and given no side at all.