Junichi Aikawa

Junichi Aikawa is the younger brother of the late Mari Aikawa and the youngest member of the Liveman team. A talented rugby player, he brings speed, endurance, and youthful determination to the expanded lineup.

Because of his age, Junichi temporarily leaves school to focus on the fight against Volt. He looks up to Tetsuya as an older brother figure, often calling him "Tetsu-chan," and grows through the guidance of his teammates.

As Green Sai, Junichi uses the Sai Cutters and pilots Rhino Fire. Despite his youth, he proves himself as a courageous warrior determined to honor Mari's memory and defend the future she believed in.