Mira Nygus is a demon weapon affiliated with the Death Weapon Meister Academy, serving as the partner of Sid Barrett, a commander in the DWMA Central Intelligence Agency. After the witch Medusa Gorgon was exposed and fled the academy, Mira took over as the interim school nurse. In her human form, she is typically wrapped in bandages that give her a mummy-like appearance, though she is occasionally seen without them, revealing medium-length black hair and blue eyes. Her weapon form is a combat knife, and her surname is a pun on the pronunciation of the word knives. Mira maintains a cool and composed demeanor, rarely showing strong emotions, but beneath that stoic exterior she is deeply dedicated to the well‑being of her students. She is kind and caring, yet does not hesitate to speak frankly when the situation demands it. She and Sid became partners after meeting at a bingo game event during her time as a student. Unlike Sid, she is not an undead being. She also appears in the spin‑off series Soul Eater Not, where she serves as a class teacher and wears glasses without her usual bandages. Her role within the story is that of a supportive faculty member who provides medical care and assists in intelligence work alongside her partner. While she does not undergo major personal development over the course of the narrative, her consistent loyalty, quiet competence, and genuine concern for her students define her character. Her primary ability is her transformation into a combat knife, which she uses in partnership with Sid to execute coordinated attacks.