After coming to the Fantasy World, Kazuma becomes much more social and outgoing and was initially excited at the prospect of becoming an adventurer. Despite this, however, Kazuma becomes increasingly pessimistic about his new life as he discovers the harsh reality of being an adventurer, such as the low pay and life-threatening work. Throughout the series, Kazuma is consistently sarcastic, cynical, and blunt, especially towards his own teammates. He is a pervert, this is a major trait.