<P> The titular protagonist of the series, Steven Quartz Universe (voiced by Zach Callison) is the enthusiastic youngest and only male member of the Crystal Gems . His characterization is loosely inspired by the series creator Rebecca Sugar's younger brother Steven Sugar, who is also a background artist for the show . Steven's portrayal as a male character whose heroism is based on traditionally feminine - coded attributes such as empathy and nurturing, and who seeks to live up to the legacy of his heroic mother, has drawn favorable reaction from critics . </P> <P> In the context of the show, Steven is the son of Greg Universe, a human musician, and Rose Quartz, the former leader of the Crystal Gems . Rose is described as having "given up her physical form to bring (Steven) into the world" as the first Gem - human hybrid, and her gemstone is embedded in his navel . At the time of the show's narrative, he is 12--14 years old, but appears younger due to the interaction of his gem's magic with his aging process . Steven is caring, protective, brave, gentle, forgiving, and eager to help the people he loves with their problems; his optimism is often a source of strength for the other Crystal Gems . His gemstone gives him a wide range of magical abilities; one of the long - term story arcs of the series is his progress in learning about and mastering these abilities, beginning in the first episode with his first successful attempt to summon his Gem weapon, which is a shield . Other long - lasting character arcs involving Steven include his anxiety about filling his mother's place in the Crystal Gems and coping with her complex legacy, and his developing friendship with his human best friend, Connie . </P> <P> The disciplined current leader of the Crystal Gems, Garnet (voiced by Estelle) is the strongest of the four . She is quiet, stoic, pragmatic, and described by Steven as "mysterious", but over the course of the series she becomes more emotionally open, especially in expressing her love for Steven . According to the writers, her great self - confidence is reflected in the fact that she never asks questions . She possesses red garnets embedded in her hands, from which she summons her Gem weapon, a pair of heavy gauntlets . She also has a precognitive ability she refers to as "future vision". Garnet has three eyes, over which she wears a visor . </P> <P> In the first - season finale, "Jail Break", it is revealed that Garnet is a fusion of two smaller Gems named Ruby and Sapphire . Garnet's existence is thus a personification of Ruby and Sapphire's loving relationship--she describes herself as "a conversation" and "made of love"--and her personality is a stable blending of Ruby and Sapphire's traits . The character of Garnet has won acclaim from critics as a representation of a queer relationship . Though she is normally stoic, Garnet's strongest emotional displays are often centered around fusion: anger and revulsion at what she perceives as abuses or perversions of fusion, and delight when Steven develops the ability to fuse . The second - season episode "The Answer", a flashback showing how Ruby and Sapphire met and formed Garnet for the first time, was nominated for an Emmy Award and adapted into a children's book . </P>

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