In some universes, Sailor Mars either liked Chad the Cloverway dub or Jadeite, like in Sailor Moon Crystal. she is in love with either Sailor Venus like in the fanfiic Venus' Flame or  no one. In some, she's either a Shinto priestess or just a total hothead. In others, she did find love with a boy named Ethan, and that's in my role plays with him. In others, she either stayed single or married Jadeite. And in a lot of universes, she has counterparts like Sailor Galaxy and Sailor Waxing Crescent.