||Casanova-kun, Bossa Nova-kun
is the successor to the third generation master of the Kasanoda-gumi, the most powerful yakuza group in Kantō, Japan. He was raised at a young age to be the next leader so in effect most people see him as a very intimidating person and he has few friends because of it. Indeed, he's most well known for his long red hair and scary-looking face. Since Kasanoda's features have been intimidating since birth, his father claimed he had the right face to become the most frightening yakuza boss in history and actually trained him to appear tough and unapproachable. Kasanoda therefore initially doesn't talk much, though he can be angered easily. Despite his outward appearance and upbringing, he actually tends to be a kind person who enjoys helping others. His classmates have nicknamed him as the feared "human blizzard". Haruhi calls him "Casanova", and Tamaki & the Hitachin twins call him "Bossa Nova".