"Amethyst" is a member of the Crystal Gems. She is the last known Gem manufactured on Earth as a part of the Gem Homeworld's Kindergarten project, and the only Gem of the Crystal Gems to not come from Homeworld. After the Rebellion, Amethyst helped her friends protect the Earth over the next four millennia, and often aids in the shenanigans of Steven Universe, Rose Quartz's son.
Role in the series
Amethyst is fun-loving and carefree. Loud and full of laughter, she is easily amused and very impulsive. Amethyst is often used as comic relief. She is bad-mannered, rude, untidy, but still good-hearted and protective. Her overprotectiveness of her junk marks her as somewhat of a hoarder. These tendencies surface in "Maximum Capacity", where she is unwilling to let Greg throw anything away in his storage unit.
Amethyst tends to indulge Steven more than the other Gems and partakes in human activities with him, generally being carefree to a fault while showing concern for his well-being in times of more severe danger. Although she does not have to, Amethyst enjoys eating and sleeping and is frequently seen doing so.
Amethyst loves a good fight, something that manifests itself in her wrestling persona, the "Purple Puma", where she willingly masquerades as a hated wrestler purely for the fun of it and to relieve stress from Pearl and Garnet's constant orders. She often loves watching fights as well and will loudly vocalize and cheer when she sees a conflict in progress, egging the competitors on, including the feuds between Pearl and Greg and between Pearl and Peridot.
Because of her origins in Kindergarten and its dark legacy, Amethyst harbors a tremendous amount of self-loathing, which is also fueled by her perception that she is inadequate when compared to Garnet or Pearl. This leaves her feeling out of place among the Crystal Gems, thinking that she does not belong with Gems of their caliber when she was created by the very thing they sought to destroy. She thought that when Steven learned of her past, he would think less of her. She worries about Steven's and Garnet's approval in "Reformed", and Amethyst demonstrates that she has difficulty thinking for herself, regenerating multiple times in the episode with new forms that were all rushed or based on what she thinks Garnet and Steven will approve of.
Amethyst is very observant of other people's feelings. She tries to reassure Steven in "An Indirect Kiss" when he was worried about her as she fell apart, knows why Pearl kept fixing the Communication Hub in "Cry for Help", and that Garnet will not forgive Pearl unless the two directly talk it out in "Friend Ship".