(All information courtesy of the Marvel Database and Wikipedia)
Name: Dormammu
Alias: The Dread One, Dread Dormammu, Eater of Souls, He-Who-Waits, Lord of 
Darkness, Lord of Chaos, Lord of the Dark Dimension, Keeper of the Mindless Ones
Affiliation: Hell Lords, Lords of the Splinter Realms, Lords of the Netherworlds
Special abilities: Sorcery over the Flames of the Faltine, banishment, superhuman strength, astral projection, matter transmutations, inter-dimensional teleportation/transportation, high-speed flight, transformation, elemental control, summoning, time travel, invulnerability, size alteration, intangibility, immortality, regenerative healing factor, energy projection, psionics, power bestowal, reality warping, resurrection, super genius intellect, master martial artist
Background: Born of the cosmos as the older twin son of the Faltine being known as Sinifer, Dormammu and his sister Umar gained matter to themselves and created permanent bodies. The twins then caused the death of Sinifer and were exiled. While in exile, they found the Dark Dimension and eventually took it over. Umar eventually went mad after having her daughter Clea (future wife of Dr. Strange), and Dormammu took over as sole ruler of the dimension. He has since tangled with Dr. Strange, the Avengers and Odin of Asgard.
Relationships: Sinifer, parent; Umar, twin sibling; Clea, niece; Donna, niece; Satannish, son; Doyle Dormammu, son; Dr. Stephen Strange, Sorcerer Supreme of Earth, nephew-in-law
First Versus appearance: Marvel vs. Capcom 3: Fate of Two Worlds
Appearances in other media:
Television: Spider-Woman (animated), Spider-Man: The Animated Series, The Super Hero Squad Show, Ultimate Spider-Man, Avengers Assemble, Hulk and the Agents of S.M.A.S.H., Marvel Disk Wars: The Avengers
Film: Doctor Strange: The Sorcerer Supreme (animated), Doctor Strange (live-action)
Video games: Marvel vs. Capcom 3: Fate of Two Worlds, Ultimate Marvel vs. Capcom 3, Marvel Super Hero Squad Online, Marvel: Avengers Alliance (non-playable), Marvel Heroes, LEGO Marvel Super Heroes, LEGO Marvel’s Avengers, Marvel: Future Fight, Marvel Contest of Champions, Marvel vs. Capcom: Infinite, Marvel Powers United VR (non-playable), LEGO Marvel Super Heroes 2, Marvel Ultimate Alliance 3: The Black Order, Marvel Dimension of Heroes, Marvel Future Revolution, Marvel Strike Force
