Amethyst is a gnome with gem like purple eyes and blonde hair styled in puffy bunches that she frequently dyes pink or blue using magic. Her skin is etched with intricate scarification runes. She possesses a pair of tattered but vibrant butterfly wings in shades of green, purple, and black. She wears gothic lolita fashion and a butterfly choker, and despite her adult age, she uses purple rose patterned diapers due to personal needs.

Amethyst is the quiet, observant shadow of her triplet sisters. Unlike her boisterous sibling Ruby, she prefers to remain in the periphery, watching for vulnerabilities and stitching together secrets. She is methodical and possesses the patience of a spider. Despite her dark aesthetic and dangerous skills as a poisoner, she has a strange, whimsical side expressed through her ever-changing hair and love for floral patterns.

Amethyst was born as part of the Borialis triplets during a rare atmospheric phenomenon where the aura above her gnome village glowed with a spectrum of unnatural light. This aura infused her with a latent fey energy that manifested as her butterfly wings and gem-like eyes. While her sisters sought the spotlight, Amethyst sought the hidden, diving into the underworld as a skilled tailor for criminal elements and a silent provider of toxins for those who needed problems to vanish without a sound. Her tattered wings are a relic of a narrow escape from a deal gone wrong, leaving her flight as swift as her observation. She eventually made a pact with a fey entity that shared her fascination with observation, gaining the ability to step through shadows and fire arrows that carry the weight of psychic screams. She travels now to complete her collection of rare toxins and to ensure her sisters remain safe from the shadows she knows so well.