Nephrite

Nephrite Facet-413 Cabochon-12, known in her corrupted state as the Centipeetle Mother, is a Corrupted Homeworld Gem that debuted in "Gem Glow". Before her corruption, she was the captain of a squadron that served Pink Diamond and a Hessonite commander. She was sent to Earth 5,750 years ago in a ship to colonize Earth, and later was trapped on Earth during the Rebellion. She currently resides in her old ship after being reunited with her crew mates in "Monster Reunion". In "Legs From Here to Homeworld", Nephrite was uncorrupted temporarily by Yellow Diamond, Blue Diamond, and Steven, with seemingly no memory of being corrupted.