Anybody else notice the small crescent moon on Fionna’s bow? The crescent disappears in the very next scene. See?
I bet the animators pulled this out to make another reference to Sailor Moon along with
being a very obvious reference to Princess Serenity’s dress (which I squeeled over the first time seeing it). The bunny ears were a nice touch, and even on Adventure Time’s official Youtube channel, Mathematical, on their episode summary “So Fionna pulled out her Sailor Moon dress…”
The only other reference to Usagi I could notice was this scene
calling out to:
Other than that, there’s Fionna’s best friend Cake
just as Luna is, a talking cat. Along with both of them having evil queens as their enemy. The Ice Queen and Queen Beryl
Oh and that they’re both blue!