Midori Shimura is the younger daughter of Dr. Shimura, the island physician on Akane Island, and serves as her father s assistant. She has an older sister named Yuki, who had a young son named Masato; Yuki was killed during an alien attack, leaving Masato orphaned and under the care of the family. Midori is a brave and intelligent girl who demonstrates a strong will to help her family and friends even in the most dangerous situations. Although she is still a child, she possesses considerable knowledge of mecha technology and often provides essential technical and strategic information that supports the main pilots in their battles against the Gaira Empire. Her character defies the conventional damsel in distress archetype, as she actively faces danger with a sound and discerning mindset rather than waiting to be rescued. Throughout the series, Midori undergoes meaningful development, learning to refine her abilities and eventually gaining skill in piloting mecha herself. Her courage, technical expertise, and determination make her a valuable supporting presence in the struggle to defend Earth, and she serves as a capable and proactive figure among the civilian members of the Akane Base team.