Rei Hino, known as Sailor Mars when transformed, is a central figure across *Sailor Moon* adaptations. Her civilian life revolves around her role as a *miko* (shrine maiden) at Hikawa Shrine, where she resides with her grandfather following her mother's early death and her father's neglect due to his political career. This background fuels her initial distrust of men in the manga and live-action series, contrasting with the 90s anime's portrayal of her as boy-crazy and interested in pop culture during early seasons. She attends T*A Private Girls School, a Catholic institution, setting her apart academically from the other Sailor Guardians. Rei's personality varies: the manga depicts her as disciplined, traditional, and contemptuous of modern relationships, while the anime emphasizes her fiery temper, frequent arguments with Usagi Tsukino (Sailor Moon), and ambitions to become a singer or model. All versions establish her psychic abilities—including clairvoyance through fire scrying and evil detection—and her skill using *ofuda* (purification charms) in civilian form. As the second discovered Sailor Guardian after Sailor Mercury, Sailor Mars wields fire-based powers tied to her planetary association with Mars (*Kasei*), historically linked to war and fire in Japanese mythology. Her signature attacks include **Fire Soul** (manipulating flames to purify enemies), **Fire Soul Bird** (creating a phoenix-like fire projectile), and **Mars Snake Fire** (conjuring a serpentine flame). After power upgrades, she gains **Mars Flame Sniper**, using a fiery bow and arrow derived from her archery club experience. Her uniform evolves into the **Super Sailor Mars** form, marked by a heart-shaped brooch, translucent shoulder pads, and a star-adorned choker. Character development diverges. In the 90s anime, Rei initially challenges Usagi's leadership and briefly pursues Mamoru Chiba (Tuxedo Mask), though their relationship remains platonic from his perspective. Her loyalty solidifies after sacrificing her life to protect Usagi during the first season's climax, an act reversed by the Silver Crystal. During the Dead Moon Circus arc, she confronts an illusion mocking her priestess aspirations, reclaiming her Sailor Crystal and remembering a past vow of chastity sworn to Princess Serenity, cementing her disinterest in romance thereafter. The manga and live-action series omit romantic subplots. Rei shares a nuanced bond with Sailor Venus (Minako Aino), serving as her second-in-command among the Inner Guardians. The live-action adaptation explores her reluctant foray into music as the idol "Mars Reiko," orchestrated by Minako. Rei's design was inspired by singer and actress Alisa Mizuki, influencing her elegant appearance and, in the anime, her musical pursuits. Later, Rei's spiritual role expands. She communes with the crows Phobos and Deimos (named after Mars' moons), who serve as familiars. During the Dream arc, her **Guardian Mars** spirit manifests—a fairy-like embodiment of her Sailor Crystal—to channel energy from Phobos and Deimos Castle, facilitating Sailor Moon's transformation into Eternal Sailor Moon and her own ascension to Eternal Sailor Mars.