Jonathan is a Night-Child, and an impossibility. He’s a seer, and a rare one – he’s never been wrong. That power is why Ravena took him, keeping him safely under Seishirou’s protection while benefiting from his skills.
In the mid 1600s, something bad happened, and Jonathan was dying. Desperate, Ravena shared her blood – and miraculously, it worked. Seers are Kin, and cannot be made into Night-Children, but Jonathan was.
He’s the third Kin in all of history to be successfully made. Kai and Elsa – twins – are the other two.
So then what is Jonathan? How can he even exist? No one really knows, but his uniqueness only increased his value. Too bad Ravena didn’t take the kind of care of him that she should…