so far, the least character development we've gotten is from amethyst. the only such development is that she is from the kindergarten and hates herself for that, as it meant that she was like a parasite. as we've seen, the cg treat her like they treat steven: they tell her little, but unlike steven, they tell her slightly more. like amethyst just realized that she wasn't supposed to be small, and I highly doubt the cg told her. amethyst is the most observant of the gems and will probably put the pieces together as the season progresses and go rogue. there are episodes entitled, the kindergarten kid and steven vs. amethyst so maybe we'll get an amethyst arc.