Marine, known as the Silver Saint of the Eagle constellation, appears in the anime Saint Seiya Tenkai-hen as a supporting character. She was originally the teacher of Pegasus Seiya during his training as a Saint, and like all female Saints, she conceals her face behind a mask as a symbol of renouncing her femininity. Her background includes a search for a lost sibling, a thread that connects her deeply to the events of Tenkai-hen.

In terms of personality, Marine is analytical and highly adaptable in battle, often focusing on discovering an enemy's weak points. She is one of the few Saints who was aware of the corruption within the Sanctuary, and she has demonstrated strong loyalty to Athena and trust in the power of the Bronze Saints. Her motivations are driven by a sense of duty to protect the goddess and her comrades, as well as a personal quest to find her missing brother.

Within the story of Tenkai-hen, Marine’s role is that of a seasoned warrior who joins the struggle against the forces of Artemis. A key development in this chapter is her reunion with her brother Toma, who has become an Angel serving Artemis under the name Icarus. This encounter brings emotional depth to her character, as she confronts a sibling transformed into an enemy. Her relationship with Seiya remains that of a mentor who cares for his well-being, and she works alongside other Saints such as Shaina to protect the Sanctuary.

Marine’s abilities as a Silver Saint are considerable. She possesses sharp mental discipline, enabling her to resist psychic attacks, and she is physically capable of feats such as scaling the treacherous Star Hill. Her combat style relies on speed and precision, making her a formidable opponent. In Tenkai-hen, she contributes her skills to the defense of Athena and the Bronze Saints, though her personal conflict with her brother adds a layer of emotional weight to her actions.