Tatsuya Shiba is a fictional character from the light novel series The Irregular at Magic High School, created by Tsutomu Satou. He is known for his exceptional magical abilities and analytical skills, often standing out among his peers at the First High School. Tatsuya is characterized by his calm demeanor and strong sense of loyalty to his family, particularly his younger sister, Miyuki Shiba. In the series, Tatsuya's unique talents allow him to perform advanced magic that others cannot, making him a key figure in various conflicts. His character often grapples with the challenges of being an irregular in a world that values conventional magical prowess, leading to complex relationships with other characters.