Kojima is an officer of the Earth Federation Forces who serves as the commander of a forward outpost in Southeast Asia during the One Year War. His assignment involves investigating the secret base of Ginias Sahalin and overseeing the operations of the 08th Mobile Suit Team along with other squads in the region. He reports directly to Colonel Isan Ryer. Kojima is a calm and reserved individual who prefers the natural environment of the jungle over the controlled climate of a space colony. He carries out his duties with a professional focus on mission objectives and the support of the units under his command. His role in the story is primarily that of a base commander who assigns missions and provides strategic direction for the 08th MS Team, acting as a link between the frontline soldiers and higher command. Kojima maintains a working relationship with Ensign Shiro Amada, entrusting him with critical operations against Zeon forces. He does not undergo significant personal development over the course of the series, remaining a steady presence at the outpost. His notable abilities include effective command and logistical management in a demanding jungle warfare setting, as well as a practical understanding of the terrain and guerrilla tactics needed to operate in that environment.