Garnet, also known as Dr. Tiffany Quelle, is the leader of The Crystal Gems and one of the main characters of the IG-88's Adventures Series. Her characterization and backstory in the IG-88's Adventures Series is different from Steven Universe, as she was once a human scientist named Dr. Tiffany Quelle before becoming a Gem after a space incident, which is similar to how The Fantastic Four got their powers, gave her powers and transformed her into what she is today. She is voiced by Estelle.