Giyu always wears a stoic and unbothered expression. However, he has a reserved personality and a very strong sense of justice. He shows zero hesitation when killing demons and has no respect or mercy towards them. He is a man of very few words and has trouble interacting with others, so he usually keeps himself at a distance. Beneath his seemingly unemotional and aloof attitude, Giyu suffers from an inferiority complex. Giyu is shown to be protective and caring towards those he is close to.