Ena Makinohara is the younger sister of Jin Makinohara, leader of the Dawn—the second segment of an ancient spaceship discovered on Earth. She exhibits a naive personality with a pronounced brother-complex, displaying unwavering attachment and devotion to Jin.

Operating Zenon Guardians against the Zenon Empire, Ena pilots the advanced transforming robot Brave Valkyrie. Her exceptional piloting skills make her a vital combat asset, where she demonstrates bravery and confidence while fiercely protecting allies.

Beyond piloting, she functions as a strategist and tactician during missions, with analytical contributions enhancing the team's operational effectiveness. Outside combat, Ena pursues interests in music and video games, adding personal dimension to her character.