The main protagonist. Prior to the series, Teppei was the son of a happy family whose father was a noodle shop owner. Coming back from school one day he learns his parents were killed in an automobile accident, he is then picked up by his grandfather, Isshin Arima, who is the owner of the Arima Financial Combine, a very wealthy and powerful industry in Japan. Isshin then demands (or asks) Teppei to become the successor to the Arima corparation and Teppei is enrolled in the most prestigious private school in Japan. He is a good swordsman and prefers sword-drawing techniques. He is also engaged to Sylvia.