Bio of robot:Since birth, Robot has been locked in a rivalry with his older brother, Gart. Often, Gart would play a game of Rock, Paper, Scissors with Robot, and always win due to Robot only being able to use scissors (while Gart, on the other hand, has the 'cool four-fingered hands'). According to the episode Between Brothers, Robot's inventions either annoyed or terrified the DeFault family, and have possibly made him the laughing stock of the DeFaults. Since he was a little kid, Robot has been close friends with an Organic named Monster, though according to Monster himself, he had been told not to trust Robot and his inventions. Throughout their friendship, Robot has seemed to use Monster as a test subject for his inventions (and has even pranked Monster in school). Despite this, Monster has stuck with Robot and cheered him on, remaining a close friend and eventual roommate. Robot has, as stated in the episode Ogo's Friend, been a rival to another Mechanical named Lucy. The rivalry started since first grade up to the twelfth grade, and even through college (and apparently it continued into a weekly vocal jazz ensemble). However, Lucy always managed to beat Robot with her own inventions.

Chi chi bio:Chi-Chi (チチ) is the daughter of the Ox-King[8][9] who later marries Goku and becomes the loving mother of Gohan and Goten. She was first introduced as a shy and fearful girl, but later, as she gets older, develops a very tomboyish, tough and fierce personality, which sometimes causes her to have anger outbursts seen several times throughout the series. Despite this, she has shown her love for Goku and their sons many times throughout the series.

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