Esther is a young gnome with pale blue skin and a pink pixie-cut hairstyle featuring distinct blue edges. Her eyes are large, striking purple orbs that seem to hold an unsettling depth. Her body is covered in complex runic scars and small tally marks that record her various rituals. She wears a purple babydoll dress with blue trim and lace, sometimes layered under her custom black legionnaire lamellar armor which is adorned with hand-painted pink butterflies.

Esther is quiet, introverted, and possesses a wisdom that far exceeds her thirteen years. She speaks only when necessary, preferring to observe the world through a lens of logical psionic analysis. She is studious and methodical, treating her magic like a science, yet she maintains a gentle fondness for her family and her peers at Bright Water Middle School.

Esther Midnight Borealis is the daughter of the renowned tinkerers Amethyst Borealis and Azure Becket, making her the half-sister of Cobalt Borealis. While her family focused on the tangible mechanics of the world, Esther found herself drawn to the whispers of the cosmic void. At a young age, she entered into a pact with a crystalline entity of immense knowledge, seeking to understand the underlying architecture of reality. The runic scars upon her skin are the physical cost of this forbidden education, documenting every secret her patron has bestowed upon her. Unlike typical warlocks, Esther treats her powers as an extension of her gnomish heritage. She balances her life as a middle school student with her duties as a guardian of esoteric truths. Her silver battle axe is not just a weapon but a focus for her psionic energy, a tool crafted through both smithing and sorcery. She remains a protective, if silent, presence beside her friends and siblings, using her limited flight and teleportation to watch over them from the shadows.