Grayfia

As a Devil noble and the former heiress of the Lucifuge Clan, Grayfia is very strict and serious with a calm, dignified and refined personality, with perfect etiquette.

As Sirzechs's wife and Queen, Grayfia is often exasperated by her husband. She also does not like admitting her relationship to Sirzechs while she is "on the job", to the point of pinching Sirzechs's face if he mentions it and denying it. Grayfia also has an issue where she becomes a "troublemaker" as stated by Azazel, who was told by Sirzechs, when she becomes drunk.

Despite her serious personality, Grayfia is a very kind and wise young woman who deeply loves her family and enjoys doing her "job" as a maid of the Gremory Clan.

As an older sister, Grayfia is very loving towards her younger brother Euclid and younger sister-in-law Rias though is also strict with them as she would sternly scold them for misbehaving, as she would often scold Rias for her selfish behaviour which cause trouble for her family in Devil Noble society due to having high expectations for her and frequently remind Rias of her responsibilities as the Gremory heiress as she tried to change Rias's flaws in order to make Rias a splendid Devil noble. Likewise, when Euclid committed terrorism and support Rizevim's dangerous ambitions out of blind loyalty towards the original Lucifer, Grayfia is harsh in reprimanding him during their reunion after centuries.

Despite often being cool, glamorous and dignified, Grayfia does have an emotionally fragile side which are connected to the people she love and cares about, as she tragically cried when her father was poisoned to death in the Devil Civil War. When Sirzechs sealed himself in the Isolation Barrier Field, leaving her behind for millenias, she fell into a depression which she kept hidden and suppressed, choosing to singlemindedly focus on supporting Issei in order to make him a Satan in response to Sirzechs's wish before departing. When Issei pleaded her to show more concern for her son Millicas, she was distraught as after losing to Rias, she finally realized how she had been neglecting her son since Sirzechs left them as she cried profusely while hugging Millicas.

Appearance: Grayfia is a beautiful young woman with a voluptuous body, appearing to be in her early twenties with back-length silver hair that features a long braid on each side with small blue bows at the ends, while the rest is let down which ends in twin braids and red eyes (silver in the anime). In most of her appearances, she is seen wearing a blue and white French maid outfit with long sleeves and a white maid headband over her head with red lipstick as a cosmetic accessory.

In a bath pool, while naked with just a towel covering the body