Rias Gremory

Throughout the series, Rias is shown to be kind and soft to her servants. She thinks of Issei as a special person, and always gets jealous when girls are around him, becoming a totally different person when she sees him and other girls together, or when it comes to training.

She is proud of her family's name, but she does not like being seen as Rias of the Gremory Family. The reason for her living in the human world is because there, everyone sees her as Rias, not as a Devil or as the Crimson-Haired Ruin Princess.

She enjoys teasing Issei and Asia, but at the same time makes it clear (to Asia or any girl) that Issei is hers, and she does not want to share him (It is revealed in Volume 3 of the novels that the Gremory Family and their servants are beings with extraordinary affection among the Devils, so Rias is no exception). She has no problem with showing Issei her breasts or sleeping naked with him (which she always does according to her).

From her mother, Rias has inherited the Bael Clan's Power of Destruction. This power allows her to release energies that can disintegrate matter, both living and inanimate, with relative ease. Opponents who wield sufficiently greater power, however, can shield themselves from this. In Volume 14, after her training with Akeno, it is revealed that Rias perfected a special one-hit kill move, Extinguished Star, which is described as a compression of unimaginable amounts of demonic power. It has the appearance of an enormous sphere with a mixture of crimson and black aura radiating from inside of it. Rias claims that she created it by solely concentrating on destruction and strengthening it, after having experienced the constant assaults from the terrorists and the death of her beloved. The extent of its power is unknown but it is stated to be extremely dangerous, with its power surpassing the retiring system in the Rating Game.