Miyuki Shiba

Shiba Miyuki is a magician and student of First High School. She is the biological sister of Tatsuya Shiba. Miyuki is the daughter of Shiba Tatsurou and the late Shiba Miya and is eleven months younger than her only an elder brother Tatsuya (her birthday falls on March 25, a month before Tatsuya's birthday). They are mostly mistaken as twins for being in the same year. Their father remarried six months after their mother's death, and the two of them are living alone in a house, which is described as a place that vastly exceeds the average size. The siblings lived alone at first, however, Minami, later on, joins them as Miyuki's second guardian.

It is revealed that she is a modified-based magician which is made especially for Tatsuya to have a life partner. Much technology was used in her modification, making Miyuki a very powerful magician. Compared to Minoru, who also has received similar modification done by Matoko Kudo before birth, Miyuki is a far more perfect and successful product proved by her stable health and lifespan. Because both of them are somehow similar in the aspect of their makings.