First Era : Era of the Fall (EotF for short)
Second Era : Era of the Fortress Cities (EotFC for short)
Third Era : Era of Awakening (EoA for short)
The Era at the start of chapter 1 is the end of the Second Era.
Awakened are people who have a rank between G and EX.
Transcendent are people who have gone beyond the EX rank and become at least Half-divinity.