I dunno, Ninetails might've been a she. My friend and I argued over this one night. xD
I did some research, and Ninetails is more of an "it" because it's based off of Kyuubi which is a female, but in Okami they portrayed Ninetails as male.
So.. "it"? xD
But yeah, I was thinking about making Shiranui but his markings confuse me. ;w;