Sailor Mars is one of the five original Inner Sailor Senshi of the Solar System, and was the fourth Sailor Senshi introduced in the manga. Her civilian identity is Rei Hino, or Raye depending on which dub you follow. Her attacks are based around fire, psychic powers and spiritual powers. This is the original depiction of the character originally created by Naoko Takeuchi.
She is voiced by Katie Griffin.
Rivals: Archer/Future Shirou
Main Enemies: Nagito Komaeda
Legends of the Multi-Universe (Menslady's Story)
Sailor Mars was separated from Sailor Moon because of the war. Somehow, she and the other Inner Scouts ended up in Nightmare Hills in the Digital World. They were found by Angewomon, Sailor Moon, Buzz Lightyear and Ghost Rider.
For the rest of the story, Sailor Mars was an ally of the Angels.
The Protectors of the Multi-Universe
Because Olivia's Sailor Senshi name is from one of the Moon Kingdoms of Mars, Sailor Mars is Olivia's godmother in a way. She also seems to have taken a romantic liking to Space Ghost...
Legends of the Multi-Universe: Weirdmageddon
Mars Fire Soul - Sailor Mars summons a ball of fire from her index fingers
Mars Firestorm Flash - a stronger version of Fire Soul that can do widespread damage
Mars Fire Soul Bird - summons a bird made of the Fire Soul fire
Mars Burning Mandala - summons a circle of fiery rings
Mars Flame Sniper - summons a bow of fire with an arrow of fire that Sailor Mars fires at an enemy
Mars Eternal Power Make-up - allows Sailor Mars to become Eternal Sailor Mars
Mars Snake Fire - summons a big snake of fire