Sylph of Breath as a rebel, a leader of revolutionary movement who is trying to overthrow a Lord of Life who cares not for needs of the Empire or their people - only for conquest, power and their warped philosophy. Prince of Rage is the younger child of said Emperor who, despite having doubts about their parent's politics, is still appointed as one in charge of suppressing said rebelion. Drama ensues.

Sounds like a solid cast, really.