Rias Gremory is a fictional character from the anime and light novel series High School DxD, created by Ichiei Ishibumi. She is a high-ranking demon known as a Devil and serves as the heir to the Gremory clan. Rias is characterized by her long crimson hair and blue eyes, and she is the president of the Occult Research Club at Kuoh Academy. In the series, Rias is known for her strong leadership skills and protective nature towards her friends and allies. She plays a significant role in the story, often guiding the protagonist, Issei Hyoudou, as he navigates the challenges of the supernatural world. Rias is also recognized for her powerful abilities in combat and her strategic mind.