Utsumi Amano, nicknamed "Ucchie," is the ten-year-old chief engineer of the Japan Republic's colossal mecha, Sxano-X. Recognized as a technical genius, she maintains and operates the unit's mechanical systems, with her expertise proving critical to Sxano-X's combat functionality. She works directly under Commander Katsumi Ohmi and Second-in-Command Tsutomu Oda, forming part of the core operational team alongside pilot Shingo Suwa and translator Mana Kamishiro.