[2] She is a nigh-omnipotent cosmic entity and a fundamental constant of mortal existence, depicted as the "twin"[3] of Oblivion, and "sister" and antithetical force to Eternity.

[6] Since her original introduction in comics, the character has been featured in various other Marvel-licensed products, including video games, animated television series, and merchandise.

[19] Death is predominantly depicted as a skeleton cloaked in a black or purple robe, and at times appears as a Caucasian human female.

A storyline in the title Captain Marvel showcases Thanos' scheme to conquer the universe, as the character becomes determined to prove his love for Death by destroying all life.

Although Thanos obtains the artifact the Cosmic Cube and succeeds in taking control of the universe, Death abandons the character when he is defeated by the combined might of Captain Marvel, Drax the Destroyer and the Avengers.

[25] In an Avengers Annual, the Grandmaster reveals his sacrifice was a ruse as he's able to steal Death's powers and via another deception tricks the entity into banishing all Elders from the Realm of the Dead, effectively rendering them immortal.

[26] The threads of this storyline continue in the title Silver Surfer where a group of 11 Elders conspires to use the Infinity Gems to kill the cosmic entity Galactus and thereby destroy reality itself.

[29][30] During the Funeral for a Freak storyline, Death appears to reciprocate the feeling, and a jealous Thanos prevents Deadpool from dying and joining the entity by cursing him with immortality.

[32] The second volume of the Guardians of the Galaxy features a new development: Phyla-Vell, the heroine Quasar, agrees to become the new avatar of Oblivion (an aspect of Death) in exchange for the freedom of lover Heather Douglas.

[34] In the last issue of this 6-part mini-series, it is revealed that Thanos, upon coming back to life, has been completely removed from the realm of death and can no longer die.

By destroying him, she kills every living thing in the Cancerverse, initiates its and the Fault's collapse, and even injures the Many-angled ones to such a degree that it will take them eons to heal.

[35] During the Chaos War storyline, Daimon Hellstrom mentions to Hercules that Death has fled their reality upon Amatsu-Mikaboshi triumphing in the realms of the dead, causing the souls of the deceased to be unleashed upon the Earth, and rendering the victims of the siege, whose injuries might otherwise prove fatal, locked in a deathless limbo.

[36] Following the Dead No More: The Clone Conspiracy storyline, Death has appeared in Las Vegas under the guise of Marlo Chandler to talk with Ben Reilly – the clone of Spider-Man, recently brought back to life and spending some time acting as the new Jackal – initially instructing him to go after a duo of teen punks randomly shooting civilians around the city, claiming that she is testing what he will do about this discovery.

[37] "Marlo" subsequently identifies herself as Death and explains that she has developed an "interest" in Reilly (greater than that she has in Deadpool or Thanos) as no other person has been brought back to life so often.

[53][54] Kayleigh Donaldson of Syfy stated, "It's no wonder that modern pop culture has enjoyed fleshing out its grim heroes beyond their skeletal foundations.

[..] In Marvel Comics, Lady Death's power is so alluring, and the woman herself so hypnotically sexy, that Thanos tries to destroy half of all living beings in the universe just to impress her.

"[56] Nat Brehmer of Screen Rant asserted, "Many fans were expecting, or at least hoping, to see Death in Infinity War because of her ties to Thanos.

[58] Marco Vito Oddo of Collider referred to Death as a "fan-favorite cosmic entity,"[59] and ranked her 4th in their "19 Most Powerful Marvel Characters" list.

[70][71] Death, renamed Lady Chaos due to Fox's broadcast standards, appears in Silver Surfer, voiced by Lally Cadeau.