Grayfia comes from the House of Lucifuge, a family of Pure-Blooded Devils from the Extra Demons whose family served under the original Lucifer. Grayfia was originally from the Old Satan Faction that opposed the Anti-Satan Faction, where she stood in the front lines as one of the most powerful Devils. It was during that time that she met Sirzechs and fell in love with him. The two of them married each other after the end of the conflict between the Old Satan Faction and the Anti-Satan Faction, eventually giving birth to a son.
Powers and Stats
Tier: At least 6-C, likely higher
Name: Grayfia Lucifuge, The Strongest Queen, Satan Yellow, Silver-Haired Queen of Annihilation, "Bina Lessthan"
Origin: High School DxD
Classification: Devil, Pure-blooded devil, Ultimate-class Devil
Powers and Abilities: Superhuman Physical Characteristics, Flight, Longevity, Binding, Summoning, Shapeshifting, Mind Reading, Mind Control, Memory Manipulation, Barrier Creation, Night Vision, Enhanced Sight and Hearing, Teleportation, Elemental Manipulation, Illusion Creation, Energy Projection, Possible Sleep Inducement, Soul Manipulation (Devils used to take the souls of humans in exchange for granting their desires), Spatial Manipulation (Casually made a large hole in space-time, creating a 'dimensional gap' along with the Four Great Satans), can damage intangible / non-corporeal targets
Speed: At least Massively Hypersonic, likely at least Sub-Relativistic (Should be comparable to Serafall)
Lifting Strength: At least Superhuman
Striking Strength: At least Island Class, likely higher
Durability: At least Island level, likely higher
Stamina: Very high
Range: Likely several kilometers
Standard Equipment: None notable
Weaknesses: Holy water (Common for all Devils)