Mast has longed to hit the high seas ever since she first saw the swashbuckling adventures portrayed in pirate films as a child. As time drew on, however, her soul-crushing tenure at the Naval Squad slowly made her disillusioned. Even so, her vibrant personality remains untarnished, and she always brightens everyone else's day aboard the ship she serves. She is often accompanied by a parrot named Morgan.
She has purple eyes and long streaked black/pink hair tied in a twintails along with large breasts. Her outfit is a military uniform consisting of white shirt exposing her black bikini top with her white jacket with epaulettes are hanging on her shoulders, choker, peaked cap, black gloves, white shorts and a pair of high heels.