Alexandrite is a youthful and slightly overweight fairy gnome with beautiful blue and silver butterfly wings that shimmer with arcane scripts. Her blonde hair is kept in two neat braids and her large expressive eyes are a gem-like purple. She wears a colorful blue and pink quilted patchwork waistcoat over her white diaper and puffy blue shorts. She typically hovers above the ground on a plush cushion with her massive battle grimoire chained to her belt.

Alexandrite is a brilliant intellectual who carries herself with a mixture of academic authority and gentle nurturing. She speaks with a clear, resonant voice and is always ready for a logical debate about planar mechanics. She views her physical body with deep love and positivity, including her use of diapers as she is doubly incontinent, which she treats as a simple, unashamed fact of life. She is much more physically capable than she looks, often surprising foes with sudden, strong hand to hand strikes.

Born as the eldest of the Borialis triplets, Alexandrite has always felt a deep responsibility for her sisters Ruby and Amethyst. Her childhood was spent in the celestial libraries of the gnome enclaves, where her natural psychic aptitude allowed her to read three books at once using her mind alone. While she shares her sisters' delicate aesthetic, she possesses a sturdiness and physical strength that set her apart. She trained in the temple of the Lexicon, learning to blend her arcane defensive spells with physical prowess. Her butterfly wings, which developed during her studies, are not just for flight but serve as living documents of her highest spells. She eventually became a head librarian and teacher, mastering the physics of the planes. She carries her massive battle grimoire with pride, using its gilded pages as conduits for her mental power. Today, she travels as a protector of knowledge and an advocate for body positivity, showing the world that even the most fragile appearing creatures can possess the strength of a mountain and the mind of a god.