Phases Two through Five are lab-built weapons the United States government created to succeed Atom Eve, its original Phase One. Every copy came out flawed, unable to last a day outside its pod, and all of them perished after confronting the sister they were meant to surpass.
Known only as Phases Two through Five, these four were engineered as follow-ups to Atom Eve, the government's original Phase One. Officials judged them defective almost from the start. Most never learned speech, and none could endure more than a single day away from the pods that kept them alive, though each still held considerable power.
After Elias Brandyworth left government service, a replacement scientist was tasked with rebuilding his greatest creation. Lacking Brandyworth's talent, the new researcher turned out unstable results, drawing on Polly, the same woman used to make Phase One, who had died giving birth and been revived only in a brain-dead state.
When Erickson learned that Phase One still lived, he ordered the surviving Phases released. They drew Atom Eve to a downtown highway, where the siblings discovered how they were all connected before turning on her. The fight killed most of them, their fragile bodies failing under the strain. Afterward, Eve conjured a portrait to hold their memory, and years later spoke of them again with Rex Splode as her true family.

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Atom Eve's siblings are Phases Two through Five, four lab built successors the United States government created to follow up on Atom Eve, its original Phase One.
The government judged Atom Eve's siblings defective almost immediately, since most never learned to speak and none could survive more than a single day outside the pods that kept them alive.
After Erickson learned Atom Eve still lived, the surviving Phases were released and drawn into a fight with her on a downtown highway, where most of them died as their fragile bodies failed under the strain.
Phase 2 was the only sibling besides Eve able to talk, and he died in her arms wishing their lives had gone differently.
Atom Eve conjured a portrait to hold their memory, and years later she spoke of her siblings again with Rex Splode, calling them her true family.
Looking for more on Atom Eve's siblings? The Dragon Ball Wiki on Fandom has a dedicated page with community notes.
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