Rias Gremory is the main female protagonist of High School DxD. She is the next heiress of the Gremory Clan after her older brother, Sirzechs, took the title of
Rias Gremory (Riasu Guremor ?) is the main female protagonist of the series. She is a 19 year old student who is 3rd year at Kuoh Academy
The next head is Rias Gremory, followed up by Millicas Gremory. The house that produced the current "Lucifer", members of the Gremory Clan are.
This is highly attributed to the Gremory's tendency to have close relations with their servants as compared to other clans. Rias doesn't seem to mind allowing