Name: Thanos
Alias: The Mad Titan
Affiliation: Infinity Watch, Black Order
Special abilities: Superhuman strength, speed, stamina, durability, agility and longevity. 
Thanos is a genius-level tactician capable of telekinesis and telepathy, can survive indefinitely without food or water and is immune to all terrestrial diseases and death from old age. The Eternal can also project plasma energy.
Background: Thanos was born on the Jupiter moon Titan to Eternals A’lars and Sui-San. He quickly developed a taste for death, intensely falling in love with Mistress Death, the physical embodiment of death. To impress Mistress Death, he killed his many children and augmented his strength and powers. He also kills millions of fellow Eternals on Titan and travels to find the Cosmic Cube. He succeeds, wills himself to become omnipotent and allies with Adam Warlock. After betraying Warlock, he manages to acquire the Infinity Gems to create a weapon to destroy a star. He loses the gems, but regains them, using them to erase half the population of the universe to prove his undying love to Mistress Death. These actions are undone by Nebula and Warlock eventually, and Thanos later joins Infinity Watch as a path to redemption.
Relationships: A’lars (father), Sui-San (mother), Eros (brother), Mistress Death (eternal companion), many children including Gamora (adopted daughter), Nebula (adopted daughter)
First Versus appearance: Marvel Super Heroes
Appearances in other media:
Television: Silver Surfer (animated), The Super Hero Squad Show (animated), Avengers Assemble (animated), Guardians of the Galaxy (animated), LEGO Marvel Super Heroes – Guardians of the Galaxy: The Thanos Threat (animated), LEGO Marvel Super Heroes – Black Panther: Trouble in Wakanda (animated)
Film: The Avengers, Guardians of the Galaxy Volume 1, Avengers: Age of Ultron, Avengers: Infinity War, Avengers: Endgame
Video games: Marvel Super Heroes, Marvel vs. Capcom 2, LEGO Marvel Super Heroes, LEGO Marvel’s Avengers, Marvel Future Fight, Marvel: Contest of Champions, Marvel Puzzle Quest, Guardians of the Galaxy: The Telltale Series, Marvel vs. Capcom: Infinite, Fortnite Battle Royale, Lego Marvel Super Heroes 2, Spider-Man Unlimited, Marvel Powers United VR, Marvel Ultimate Alliance 3: The Black Order
