The Imperial Children.
Each of them had their own distinct quirks, as introduced at the start of the game.
However, this was merely bait.
The alliance the player chose more or less reflected their stance in the game's political circle.
Franz Barielle Aetherion, the most dangerous of the three. He often served as the player's downfall if they weren't careful, and ended their progression early in the storyline.
Irene Barielle Aetherion, the most unpredictable. Though invaluable for her connections and schemes, she too could bring about the player's demise if mishandled.
Astrid Barielle Aetherion, the neutral and the most powerful of the three individually. Her fate varied drastically depending on the player's influence.
Astrid could side with Franz and become a mass-murdering weapon, or align with Irene to join her sister's efforts to thwart their brother's ambitions.
