Marina —Grand Admiral—

Es una mujer humana de 27 años, su ojo es azul, solo tiene un ojo pues en una pelea lo perdió, tiene el cabello rubio corto, mide 163cm junto a su peso de 51kg. Usualmente se la pasa en un traje de almirante blanco aunque a veces usa una pijama celesre de tiburón

Marina is the youngest admiral of Adela Navy, a trusted ally of Kanterbury kingdom. She lost her ship, Irmina, along with her crew to the invaders the day Kanterbury fell. The agony of losing her crew made her leave the navy and start a one-woman crusade against the invaders. Marina's fleet was known to be the best of Adela Navy. Her precise and quick directions allowed the fleet to release deadly barrage to any enemy. She is also well known for her powerful swordplay. Despite her small body, she wields swords almost as big as herself with incredible strength. With her signature hookshot, she can even throw ogres around. She may look aloof and cold, but that doesn't mean she lacks passion. She's just selective when it comes to what she actually wants to focus on. In other words, don't expect any attention from her unless you can make yourself her priority.

In a duel between Marina and Orca, Marina lost her left eye while Orca also lost her left arm.

The Knight, Marianne, and Sohee track the whereabouts of the Invader Crystals, and end up disguising themselves as students of Kanterbury High School. They end up being involved in school incidents speculated to be stirred up by the school's Elite Four, headed by a girl named Marina