I'm going to guess here, but I think it's a reference to the character we were talking about earlier - Haruhi. Some people think she's a guy, but she's really a girl.
Then again, deviantArt is a community where you're supposed to be, what else, deviant, so people write amusing things in jest... so Yuki can affirm if what I said was true or not, or just something funny.
Haha, it has nothing to do with Haruhi. I was just being silly. So you're right about that
On a different note - my friend in high school had that Momiji backpack! It was amazing what it could carry.... she went through four+ years (add in middle school) with it, and might still have it. It never was weird for her to have a bunny on her back to us, because we were used to it, but once we got into public, people were like "Uhm... what's up with that? You realize there's a rabbit on your back?" and we'd just laugh, because we totally didn't even think about it.