History of character has not yet been written.
- This version of Delta (Earth-One), including all history and corresponding appearances, was initially erased from existence following the collapse of the original Multiverse in the 1985–86 Crisis on Infinite Earths limited series. However the ending of Convergence retroactively prevented that collapse, saving all the alternate realities, though in an "evolved" form. Even though versions of the character may have since appeared, this information does not apply to those versions.
- 5 Appearances of Delta (Earth-One)
- 2 Images featuring Delta (Earth-One)
- Quotations by or about Delta (Earth-One)
- Character Gallery: Delta (Earth-One)
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This character, team or organization, is or was primarily an enemy of the Batman, or the Batman Family as a whole. This template will categorize articles that include it into the category "Batman Villains."