Grayfia Lucifuge is the wife and Queen of Sirzechs Lucifer and the mother of Millicas Gremory. She is also the older sister of Euclid Lucifuge and the sister-in-law of Rias Gremory. Grayfia is known as the Strongest Queen and the Silver-Haired Queen of Annihilation, and is the only member of Sirzechs' peerage who stayed behind after the events of the Evil Dragon War.Grayfia has a very strict personality and she is often exasperated by her husband. She also does not like admitting her feelings 