Over a decade has passed since Amelia took on the role of Keeper to the Orange Flame. A role she excelled in until the day the Stranger disappeared.
No one knows if the man or woman simply retired or more than likely fell in battle. Regardless the Green Flame is exposed and requires a new Keeper.
To that end Amelia volunteered to replace her teacher and continue his practice of traveling from Lighthouse to Lighthouse in aid of his fellow Keepers while a new Keeper assumed the title of Keeper to the Orange Flame. A decision both flames agreed upon, hence Amelia's hybrid suit.