Rei's Senshi identity is Sailor Mars. She wears a uniform colored in red and purple, along with red high heels, and in the manga and live-action series has a small red jewel at the waist. She is given specific titles throughout the various series, including Soldier of War and Soldier of Flame and Passion. Her personality is no different from when she is a civilian, although certain powers are unavailable to her in that form.
Sailor Mars (セーラーマーズ Sērā Māzu) is one of the central characters in the Sailor Moon metaseries. Her real name is Rei Hino (火野 レイ Hino Rei, or Raye Hino in the English versions), a Shinto priestess and schoolgirl who can transform into one of the series' specialized heroines, the Sailor Senshi.
Sailor Mars is the third member of the Sailor Senshi to be discovered by Sailor Moon, after Sailor Mercury, and is the secondary leader of the Guardian (or "Inner") Senshi after Sailor Venus. She manipulates fire and heat, and has various psychic abilities related to her role as a miko in the Shinto shrine where she lives.
Aside from the main body of the Sailor Moon series, Rei features in two different manga short stories. The first, Casablanca Memories, is entirely about her and her past; the second, Rei and Minako's Girls School Battle, is shared with Minako Aino. A number of image songs featuring her character have been released as well, including the contents of three different CD singles.
Tuxedo Mask (タキシード仮面 Takishīdo Kamen?) is a fictional character and one of the primary protagonists of the children's Sailor Moon metaseries. Named Mamoru Chiba (地場 衛 Chiba Mamoru?, Darien Shields in the English-language versions), he disguises himself in order to support the series' central heroines, the Sailor Senshi. Wearing a mask to conceal his identity, he interferes with enemy operations, offers the Senshi advice, and sometimes physically aids them in battle. Like the Senshi, Tuxedo Mask possesses a power item like theirs: a Sailor Crystal, which gives him guardianship over the planet Earth. He also has psychic powers, including psychometry and healing, which evolve and become important to the storyline in the manga, but which play only a minor role and remain static in the anime. Along with his primary love interest Sailor Moon, a significant player in much of the story, he has royal credentials in the "past life" storyline as well as in the future.