Selestira is a lean, long-limbed high elf with warm bronze skin, straight black hair cut just below the jaw, and pale gray eyes that catch blue sparks whenever her magic stirs. Her teeth are slightly pointed, most noticeable when she laughs with one side of her mouth raised. She dresses in layered charcoal and faded blue, favoring practical clothes that can pass for a courier's uniform or a prisoner's rags. Her voice is normally low and precise, but when frightened her breathing becomes shallow and audible, and every third word carries a faint crackle of static.

Selestira is observant, dryly humorous, and uncomfortable with sincere praise. She treats every conversation like an investigation, remembering small inconsistencies and filing away names, accents, and nervous habits. Despite her suspicion, she is fiercely protective of people who have been condemned without proof. She prefers clever exits to heroic confrontations, but once someone under her protection is threatened, she becomes startlingly direct.

Selestira grew up in a high elven family that preserved old maps, court records, and disputed genealogies for noble houses that preferred their secrets carefully catalogued. Her sorcerous power first appeared not as a grand display, but as a failure of ink. Whenever she became angry, written words rearranged themselves on the page, exposing hidden annotations and false signatures. Her older brother, Tarek, taught her to control the effect by breathing in counted intervals. He later disappeared while investigating a network that used forged warrants to seize property and silence witnesses. The only trace he left behind was a silver feather brooch worn by a hooded man with a scar.