Editing Dr. Gero (section)

=== Background ===
Dr. Gero fathered two children with his wife, [[Vomi]], one of whom was named [[Gevo]].

As the head scientist and a founding member of the Red Ribbon Army, Dr. Gero played a crucial role in designing the army's weaponry and creating the first androids. He believed that androids were superior to mechanical robots, as they could think independently and were less likely to be captured and repurposed by enemies. Another scientist, Dr. Flappe, is credited with creating Android 8, but the inconsistency is addressed in ''Daizenshuu 7'', which states that Dr. Flappe and Dr. Gero were colleagues in charge of the Red Ribbon Army's Android Development Program. Gero's desire to create androids and cyborgs wasn't solely motivated by the Red Ribbon Army's objectives; he always dreamed of replacing the entire human race with artificial beings, even before Goku defeated the Red Ribbon Army.

After the Red Ribbon Army's defeat by Goku, Dr. Gero retreated to his laboratory in a mountain area north of North City, where he continued his work on creating the ultimate fighting machine. With funding from Magenta, Gero used an intelligent tracking device disguised as a ladybug to study Goku and the Z Fighters for years, observing their battles against [[Tien|Tien Shinhan]], [[King Piccolo]], [[Piccolo]], and the Saiyans [[Raditz]], [[Nappa]], and [[Vegeta]].

Dr. Gero modeled the powerful Android 16 after his deceased son, Gevo, a high-ranking Red Ribbon soldier who had been killed by an enemy bullet. In his affection, Gero made Android 16 powerful but gentle, as he could not bear the thought of him being destroyed in battle. Dr. Gero also created Android 19, based on a doll he had taken as a trophy from an enemy base.

Gero ceased studying Goku's power when the Saiyan left for Namek, believing he had already gathered enough information. He adjusted the androids' power levels to account for Goku's expected increase in strength, unaware of the Super Saiyan transformation. Confident that he had created the ultimate fighting machines, Gero finalized his plans and constructed a series of Androids. While searching for fresh material for his experiments, Dr. Gero encountered two notorious delinquents, a brother and sister, whom he kidnapped and transformed into Android 17 and Android 18. However, the siblings retained their human free will and became rebellious, prompting Gero to deactivate them. According to Android 18, Dr. Gero destroyed all the other androids up to [[Android 15]] because he couldn't control their personalities, which were often too dark, too stupid, or too nice.

To achieve immortality, Dr. Gero had Android 19 turn him into an android, becoming Android 20. The only remaining human part of him was his brain, which was transplanted into his new android body. Instead of choosing an infinite-powered model, which would have given him greater power reserves, Gero opted for an energy-absorbing model, possibly because he believed it would be easier to control. Gero later disguised his true identity by claiming that he was merely Android 20 and that Dr. Gero had died long ago.

While constructing the Androids, Dr. Gero discovered a method to fuse together the cells of the strongest warriors on Earth—Goku, Piccolo, Vegeta, [[Frieza]], and [[King Cold]]—to create a supreme fighting entity. However, realizing that the project would take too long to complete, he left his supercomputer to finish the ultimate being, which he named Cell. Cell later speculated that Dr. Gero intended him to defeat the Earth and eventually destroy the entire universe.