Sakka always wears a stoic and unbothered expression on his face. However, he has a reserved personality and a very strong sense of justice with no tolerance towards those who don't know their own limitations and throw away their lives. Despite letting Humans live due to overcoming Muzan’s blood, he shows zero hesitation when killing bad-minded demons and has no respect or mercy towards them as like most Demon Slayers. Even so, this implies that he doesn't completely despise demons as most do.