Akira Kiso serves in the Earth defense forces' elite Crasher Squad, operating alongside Takeru Myojin, Kenji Asuka, Naoto Ijyuin, Mika Hyuga, and Namida Akagi under Commander Shigeru Ohtsuka. He defends Earth against threats from the planet Gishin, performing combat missions and tactical support during engagements with hostile forces. Kiso remains an active participant throughout the conflict against Emperor Zuul's armies and subsequent extraterrestrial threats.