When Luna is eight years old, Noct is four and her father comes to her and speaks quietly, "Noctis, my son, there are some things you must know." He sets her on his knee, like he always does. He looks tired more often than not these days. He opens his mouth and proceeds to explain, in the simplest terms, what Luna has wondering for the past four years of her life.
"The Lucian kings," He says, "Have been blessed by the gods. They are granted two bodies to reside in as… a safeguard, if you will. Noctis, you must not tell anyone who you reside as in this world as, until one of your bodies perish. It is dangerous for anyone to know."
He knows, she realizes. Maybe she can… Luna casts her eyes on him. "Even you?" She asks quietly.
Her father looks surprised for a moment, then shakes his head and laughs quietly. "It usually occurs four years after birth, but I see you are not surprised by what I am telling you. It must have already happened, yes?"
Luna nods. "I was someone first, and then I was Noctis too," She says, letting a bit of her Tenebrae accent slip through.
"Stop," Her father says, holding up his hand for her to stop speaking. "Do not tell me any more. You must not tell anyone, Noctis, including me. Do you understand?"
"Yes, dad."
Luna is inordinately quiet during dinner that night, and Ravus and her mother look at her questioningly, but she simply eats her carrots without complaint, despite their bitter tang.