"Sorry," he said, tilting his head as he looked Felix over, "it's just, I think we've met before?" A lifetime ago, Felix would have said yes. Each timeline plays out a little different, but there is a constant in Felix and Sylvain.

I took a kingdom with blood and iron. I did not expect to lose control over a single boy. Elias is nothing. A mute servant with no voice, no power, and no place beyond quiet obedience in a palace ruled by fear. He survives by staying small, by avoiding notice, by never giving anyone a reason to look twice. Until I did. I am not a gentle man. I am King Kazimir, and I do not release what I claim. What began as curiosity became something far more dangerous-an attachment I cannot ignore, and a need I refuse to name. He cannot speak. He cannot fight. He barely understands what I am making of him. Yet I pull him closer, step by step, into a place he was never meant to stand-at my side, under my gaze, and entirely within my control. And I do not let go of what is mine.

Byleth, the Ashen Demon, is the professor of Blue Lions House. While a skilled mercenary and inspiring mentor, he has a penchant for blunt honesty and miscommunication. His teaching assistant and sister, Alythia, has no renown for fighting but was known for offering valuable counsel to students, nobles and academy faculty alike. Byleth was the strength the Blue Lions followed. Alythia was the tactician and heart behind their strides. They were two halves of one whole, completing each other's weaknesses with their strengths. After being dependent on each other their whole lives, Alythia and Byleth learn to grow and forge their own destiny. [Azure Moon Route, main F!BylethxFelix, minor M!BylethxDimitri]

Imperial year 1159 a nun of Garreg Mach monastery dies mysteriously during child birth leaving behind her beloved daughter Byleth. In a turn of events her Father attempts to flee with the child in the dead of night, only to fail. Now Byleth grows up under the guidance of her strange grandmother while her Father and her reside in the monastery.