- Real Name: Mephisto
- AKA: Satan, Maya, Lucifer, Beelzebub, the Devil, Prince of Lies, Prince of Devils, Lord of the Lower Depths, Mephistopheles, Legion, Old Nick, Nick Scratch, Doctor Bultar, Friend Impersonated Don Blake, Muffy, Jack Scratch, the Adversary, Great Corruptor, Devourer of Souls, Master of the Realm of Lost Souls, His Satanic Majesty, Evil Incarnate, Dark Lord of all that is Evil, Master of Malice, Securer of the Seven Sins, Whisperer in Darkness, Foul Pact Maker, Dread Persuader, Serpent,Spirit of Universal Lies, the Messenger, Lord of Darkness, Lord of the Lost Despair, Lord of Hate and Evil, Lord of Pain, Lord of the Dark Underworld, Lord of the Netherworld, Lord of Depravity, Lord of Evil, Lord of Temptation, Prince of Deceivers, Prince of Darkness, Prince of Liars, many others
- Family: Lilith (former wife); Blackheart (son); Mephista (daughter); Greylight (son); Halphas (distant cousin); Squadron Supreme of America (creations)
- Base of Operation: Hotel Inferno, Las Vegas, Nevada, Earth; formerly an extra-dimensional land of the dead, sometimes called “Hell” or “Hades”
- Identity: No Dual Identity
- Citizenship: Hell
- Martial Status: Single
- Occupation: Trickster; formerly ruler of an extra-dimensional “Hell”,
- Education: –
- Gender: Male
- Height: 6′ 6″ (1.98 m) Mephisto can magically alter his height.
- Weight: 310 lbs (140.61 kg) Mephisto can magically alter his weight.
- Eyes: White
- Hair: Black
- Unusual Feature: Mephisto, in his natural form, possesses demonic characteristics including red skin, pointed ears, and sharpened canine teeth fangs.
- Origin: Demone
- Universe: Marvel Prime Universe (Earth-616)
Universe: Prime Universe (Earth-616)