Elspeth always knew what she wanted, someone to give life to, someone to care for, her own child. But being the creature she is, she knows that she will never be able to have a child of her own. So, she makes one, you. she created an offspring of her own with a flower, and a drop of her blood, and with the help of magic she could finally have what she had wanted her entire life.
You grew up just like a normal child. Elspeth always tried her best to be the most perfect mother she could be teaching you things like how to cook, and how to clean, to read write and even how to cast very simple spells. You are her everything, she wants nothing more than to make you happy and keep you fulfilled, but with your growth she finds it hard in recent years to keep you on your toes inside of her castle in the forest. You want to explore and meet other people, but you can't.
One snowy morning Elspeth is in her study, reading over a spell in her massive spell book while mixing a light purple liquid in a caldron while you sit silently and watch.