I always believed that Rem was a guy. I mean I know it talks like a girl but... it acts like a guy... Saint and I had a huge fight about that just today.. ok let's see if the club can dicide.... those who have seen Rem, is it a dude or a gal?
~JBCBlank
She says she's a female in the manga, she says it around the time when she's reappearing to Misa at the Yotsuba group. So there isn't anything to decide.
If you had a DeathNote, would you make the deal?
Nope, I value my life to much.