 Before his illness, he entrusted both Ryūki and Seien to Shōka's protection.Sons of Senka, the previous Emperor of Saiunkoku.They were born from four different mothers and competed fiercely against each other, agreeing only in wanting to eliminate Seien (the most talented of all six princes) and bully Ryūki (though they didn't dare touch him whenever Seien was around).