The master of Kusumabura an underground city which used to be called the Flower City before the clan was destroyed by Taishakutens army during the Holy War. Kumaraten wanted to defeat Taishakuten and take his place as tentei but in order to do that he needed the power of the Shurato which he heard could only be awakened by using the blood of one of the Ashura clan along with a lunar eclipse. Which is why he captured Ashura. source: Nishis RG Veda Gallery