Grayfia Lucifuge

Grayfia Lucifuge is the Maid of the Gremory Clan, the wife and Queen of Sirzechs Lucifer, Rias' older sister-in-law, and the mother of Milikas Gremory. She is a Queen known as the Strongest Queen and the Silver-Haired Queen of Annihilation.

Appearance
Grayfia is an attractive-looking woman with silver hair that flows down to her back and matching eyes. Her hair has two braided side bangs with small blue bows at the ends, while the rest is often let down, ending in twin braids. In most of her appearances, she is seen wearing a blue and white maid uniform. She is often seen wearing red lipstick.

Powers & Abilities
Grayfia is Sirzech's queen and a very powerful devil, on par with the Four Satans. She uses Ice-based magic.

Trivia

 * Grayfia once challenged Serafore Sitri for the title of Leviathan.
 * Grayfia's last name, Lucifuge, is a reference to Lucifuge Rofocale, a demon in charge of Hell's government and Lucifer's subordinate. Her role as Sirzechs' wife and Queen justify this reference.