mamoru

also known as tuxedo mask, despite not being a sailor guardian, he is a loyal Ally to them and he's also the wife and boyfriend of Sailor Moon, even though he's a bit of a douchebag but he's still a brave and caring man, he's also known as Prince Eydamien. he also married Sam and moon and has a daughter named chibiusa. he's also been on Sailor Moon's side whenever she's in danger. (PS, you can start the story however you want)