Birthdate: 1. October Zodiac: Libra Bloodtype: B Body size: 170 cm Weight: 54 kg Katsumi is Koji’s manager and best friend. When his sister Madoka died after long suffering, Koji was there to sing a song special to her. Thereupon the record company of his Uncle signed Koji on. Katsumi is very open minded and smart. He flirts with everything that can move.