I'm really curious about this shaddy organisation. What do they want?
Spoiler from the novel--->
The late duchess was actually sent by the organisation. So they could plant a spy of their own in one of the three great houses. And since house sorphel had no divine beast, they were the easy target.
Their target was the 2nd born child, since the first born, the heir is unconditionally protected by the divine beast's blessings, they can't touch him. But the 2nd child would be easy. Once it was born they'd swap the soul of the child. But mommy fell in love with the duke and her unborn child. She didn't want her child to be used by such monsters so the moment she learnt she was pregnant with their 2nd, she ran away. She kept running from the organisation all her life..but eventually got caught 3 yrs ago and murdered. Both her and her daughter. Then they stole Rania's body.
They've been planning for years. Their purpose sounds dangerous..