One of the Black Templar Emperor's Champion's Special Rules states "Always an Independent Character: The Emperor's Champion always fights as an Independant Character and may never lead, join, or be attached to a Command Squad."
Does this prevent him from joining any other type of squad? The main rulebook states Independent Characters can join any squad, and since his special rule only excludes Command Squads, I'm thinking he's fine to join anything else, but I could be misinterpreting this.