He is the eldest son of Soth. He was kicked out of the family due to a frame-up and became a slave in a shop who was beaten and scolded.
But he was unwilling to accept the status quo and wrote a "thank you letter" with jam to break out of the prison.
In the woods, he was picked up by Osir, the owner of Rai's family. At that time, Osier thought he was just an ordinary kid, but he didn't know he was in big trouble.
During the days when he lived in the manor, his attitude toward Osir changed from awe and respect at the beginning to a loyal dog that only wags its tail in front of Osir. His emotions were deteriorating bit by bit.
Osir realized this, but still treated him as before. Osir needs the child's loyalty and family power to complete a secret and bitter thing...
Purpose: Love and redemption