Akira Hīragi (柊 晶 Hīragi Akira) is the Governor of Mermaid Island and, most of the exiles believe, the only male inhabitant, however, she is actually be a woman in disguise and Torino Kazami is the only one who knows Akira's secret.

Akira is a tall young woman with short dark red hair that has bangs swept to the left and green eyes.

During her tenure as Governor of Mermaid Island, Akira needed to look like a male and so she had cut her hair for the role, though many of her feminine features were still distinctive. She also wore a white military uniform with red trim and gold braid over an androgynous figure.

She has been shown to sneak out of Welter, opting to wear a long wig (the same hair color and length of her original hair) and a white sun dress with a baby blue ribbon tied along it.

She is distinctively more mature than the rest of girls on Mermaid Island, a trait which she shares with Torino Kazami.