Kyosuke Nanbu is the main protagonist of Super Robot Taisen Original Generation. He is the elite pilot of the PTX-003C Alteisen, a heavily armored personal trooper known for its immense firepower and distinctive Revolving Stake weapon. As a member of the ATX Team, Kyosuke is recognized for his calm demeanor, sharp tactical mind, and unwavering resolve in battle. His leadership and piloting skills make him a crucial figure in the fight against alien threats and rogue factions throughout the series.