"2. The adventures from version 1.0 are called "Warriors of Light"."

This is not true, you are called a WoL regardless of whether or not you are a Legacy player. The first time this is mentioned in story is the level 15 quests where Raubahn says you are one of them too, even if you are a 2.0 player.


Anyway.

VII: Shinra and Garlemald share a similar origin in the sense that they both started small and insignificant, until they figured out how to use the world's dominant element (Ceruleum is a refined form of Aether) to their advantage and exploded in power.