Sailor Mars is one of the five original Inner Sailor Senshi of the Solar System. Her civilian identity is Rei Hino (Raye Hino in the English adaptions) and is the second member of the Senshi to be discovered by Usagi Tsukino. Her powers are associated with Fire. Throughout the various incarnations of the series, Sailor Mars was given various titles and/or referred to herself with various titles. They include: "Soldier of War", "Soldier of Flame and Passion" under the guardianship of the "Fire Planet", (and depending on the continuity), "Soldier of Flame" and "Soldier of Passion." She was also called "The Guardian of War" by Neo-Queen Serenity.