Due to her being (unknowingly) left in the Kindergarten long after the rest of her sisters, Amy is nowhere near disciplined. She acts more like a child than a soldier, and has some animal-like tendencies, such as her sometimes walking around on all fours.
Season 1 Edit
Season 2 Edit
Season 3 Edit
This version of Amethyst takes most of her cues from how Amethyst was portrayed in the Steven Universe episodes "Story for Steven", "We Need to Talk" and "Greg the Babysitter", right down to her appearance.