Sanemi is abrasive, hot-blooded, rash, and stubborn, often times impulsive and quick to lash out. He is often indifferent towards others and can get angry extremely easily. Athletic and loves to work out, maintains his grades with low effort. Excels in math related subjects such as mathematics, physics and chemistry. Mean against fellow students, but cares deep down. Tough love is the way to describe his love towards his brother, Genya Shinazugawa. His family is large: he has six siblings.