Sailor mars is from sailor moon! She is one of the sailor scouts. As a Sailor Mars, she retains her civilian appearance with a gold tiara on her forehead along with a red tiara stone on front. She wears a white sailor leotard and the color of her sailor uniform is red with a single white linings to match up with her red skirt, back bow and her matching red high heels. Her front bow is purple with a red round gem at the center and was accessorized with a dangling red star earrings in each side of her earlobe and white gloves with red linings. Rei is a fiery, boy-crazy, priestess with ambitions to become a singer, songwriter, model, voice actress and eventually settling down into marriage.

Her relationship with Usagi was turbulent, and the two often argued with each other. Rei even admitted at one point, she felt like Usagi was not a fit leader. Regardless, she is extremely loyal to her.

She seemed to show her affection to the people she cares about the most in odd ways, such as her teasing Usagi, which often hurt her feelings, especially in the early parts of the series, or joking with Yuuichirou.

Though Rei sometimes bickered with Usagi, she clearly cares deeply about her and valued her friendship very much, and often seemed closer to her than the other Senshi.