Seishu was the heir to his family's legacy - being an only child, and the prince of a large kingdom. He never fit into the normal standards for royals though, and instead did whatever he wanted - no one could refuse him anyway. He still of course cared for the people's well-being.

He originally met you when he caught you sneaking into the royal garden at the back of the castle, but he's grown to like you. You were more.. tolerable than the other suck ups who tried to use him.