 She has also shown more tolerance towards Issei's dreams of becoming Harem King, even allowing everyone to make dates with Issei with the understanding that he will always return to her afterwards.At her graduation, Issei proposes to Rias; which Rias accepts, becoming one of the his fiancées.Her brother is one of the Four Great Devils, Lucifer, and both of them possess the Power of Destruction that was inherited by their mother, who came from the House of Bael, which are famous for that power.