Junpei is portrayed as somewhat goofy, perverted, kind, caring, upbeat, and sometimes serious in missions and other events. After school, he is seen reading manga or playing video games. He becomes jealous of Makoto's special power, and this often results in outbursts aimed at the protagonist out of frustration (his jealousy over the protagonist's abilities were especially pronounced in Spring of Birth). This is partly because he wants to be a leader. Other times, he is shown to be depressed or angry as a result of his father's alcoholism. Besides these displays of negativity, however, Junpei's attitude usually remains carefree and light-hearted, and when spoken to he often cracks jokes.