Primula is one of the few survivors of the original human race after the Ice Age. She was saved by Myrddin and was the one who receive the gift of fire. The White Spirits later gave a minor adjustment to the human race - to mindlessly forever praise and worship the Creator until they die.
She and the other humans was freed by that adjustment by Arawn and was taught to speak and what emotions are. She was watched over by Arawn ever since his banishment from the Heavens.