Joe appears on screen for only a moment, yet his shadow stretches across all of Tengen Toppa Gurren Lagann. He is Kamina's father, the Giha Village man who climbed out of the underground ahead of everyone else and left his son a promise that shaped the boy into a legend.
Episode 2 holds Joe's only appearance, and the series preserves little of him visually. His most recognizable trace is secondhand: the red and orange cape that passes to Kamina, who wears it into battle marked with the Team Dai-Gurren emblem.
The one choice the story records speaks for him. Joe wants his boy beside him on the climb to the surface, but when the child's fear wins out he refuses to force the issue, letting Kamina stay behind and sealing the parting with a promise of a future reunion.
Born in Giha Village and counted among the Spiral-blooded humans of the setting, Joe achieves what almost nobody underground manages while Kamina is still small: he reaches the open surface. Father and son never see each other again. Joe dies in the world above, and when Kamina eventually learns of it, the news leaves him solemn for barely a night, at least outwardly. The drive to follow his father upward becomes the engine of Kamina's entire life.

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Joe is Kamina's father, a Spiral-blooded human from Giha Village who manages to reach the surface world while Kamina is still a young boy.
Joe wants his son to climb to the surface with him, but when Kamina's fear gets the better of him, Joe refuses to force the issue and lets the boy stay behind, promising the two will reunite in the future.
Joe dies on the surface, and father and son never see each other again. When Kamina eventually learns of his father's death, the news leaves him solemn for only a night or two.
Joe's most visible legacy is the red and orange cape he once wore, which passes down to Kamina, who marks it with the Team Dai-Gurren emblem and wears it into battle.
Joe's choice to leave for the surface and his promise of a future reunion becomes the driving force behind Kamina's entire life, fueling his own determination to reach the surface.
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