Android 21’s transformation into a Majin is a pivotal plot point in the Dragon Ball FighterZ storyline. While originally created as a human-based android by Dr. Gero, her latent cells derived from Majin Buu ultimately awakened, leading to this dramatic change. These cells, combined with her advanced cybernetics and exposure to other powerful fighters’ DNA, triggered the emergence of the Majin persona.
The presence of Majin cells within Android 21 is crucial because it grants her immense power, regenerative abilities, and the insatiable hunger for consuming other beings to absorb their power. This transformation presents a significant threat to the Dragon Ball universe, as it elevates her to a level comparable to other major antagonists in the series. Her duality, a struggle between her scientific intellect and the ravenous Majin influence, drives much of the narrative conflict.