Rei Hino, Sailor Mars, fulfills her duties as a miko at Hikawa Shrine while attending T.A. Girls' Academy, a Catholic private school. Her spiritual role grants her psychic talents—precognition, fire divination, exorcism—executed through chants and ofuda scrolls, all honed via meditation tied to the shrine’s sacred flames. In civilian life, she sports raven-black hair with a subtle violet sheen, piercing purple eyes, and crimson stud earrings. Her Sailor Guardian uniform evolves with her power: a scarlet skirt and dark red sailor collar in her base form, later upgraded to include six-pointed star earrings in her Super guise and ethereal shoulder pads in her Eternal iteration. Her pyrokinetic arsenal, such as Burning Mandala and Mars Snake Fire, intensifies under Neo-Queen Serenity’s planetary energy during the Black Moon conflict. Raised by her grandfather after her mother’s death and her politician father’s abandonment, Rei harbors distrust toward men, compounded by a past-life vow of chastity to Princess Serenity. This contrasts with fleeting vulnerability, as seen in her unrequited attraction to her father’s secretary in *Casablanca Memories*. Her companions, the crows Phobos and Deimos, later emerge as guardians from her Silver Millennium existence as Princess Mars. Initially isolated due to her psychic gifts, Rei grows into a devoted ally of Usagi Tsukino (Sailor Moon). She faces off against Jadeite in the Dark Kingdom arc, purging malevolent spirits with her newfound Guardian abilities. Captured by Rubeus during the Black Moon crisis, she later breaks free to help vanquish Prince Demande and Death Phantom. In the Infinity arc, she combats Daimons and probes threats like Mugen Academy alongside allies. Her relationships mirror her evolution: a fierce camaraderie with Minako Aino (Sailor Venus) cements their shared leadership, while frequent clashes with Usagi mask profound mutual trust and dedication to the latter’s growth. Later media (*Eternal*, *Cosmos*) showcase her unwavering role against cosmic foes. Shinto traditions deeply influence her character—rituals, shrine duties, and her name, blending the kanji for "fire" with a phonetic nod to "ray." Uniquely among Guardians, she wields combat prowess even as a civilian, mastering martial arts and archery, embodying her dual identity as mystic and warrior.