Andy DeMayo is the cousin of Greg Universe
and the first cousin of Steven Universe once removed in the cartoon Steven Universe. He is initially hostile to the Gems, but grows to accept them into his family.

In Steven Universe, S. or the Mystery Girl resembles Rose Quartz, but with a lip ring and a jacket tied around her waist. Steven, Amethyst, and Pearl are at the Big Donut when Mystery Girl catches Pearl’s eye.

Greg Universe is the father of Steven Universe, from a relationship with Rose Quartz, and owner of a small car wash. He was once somewhat important to the Crystal Gems, but today he is no longer need. Quite sad if I do say so myself.

In Steven Universe, Smoky Quartz is the fusion of Steven and Amethyst. They formed for the very first time in their debut episode, “Earthlings”. Smoky wears two crop-top shirts, one similar to Amethyst’s, and one that resembles Steven’s. Steven’s shirt is noticeably stretched due to Smoky Quartz’s size.

In Steven Universe, Peridot is an antagonist until she reaches a truce with the Crystal Gems. She lives at the barn with Lapis Lazuli. She wears various shades of green to match her lime-green skin and yellow-green hair.

In Steven Universe, Lapis Lazuli is a former Homeworld Gem that made her debut in “Mirror Gem”. She has a blue lapis lazuli gemstone embedded in her back, in the form of a water droplet, from which she is able to summon and remove wings created out of water at will.