I'm looking for a oneshot that I'm almost certain was called "Dwarf Planet My Ass" or maybe something more appropriate.
I haven't had luck with Google, which makes me think maybe it was posted to a defunct website instead of Pit of Voles.
It had Setsuna show up at the consortium or whatever when they were going to demote Pluto to the status of Dwarf Planet, launch a Dead Scream at the person advocating it, state that her home was indeed a planet, and say something about not needing to repeat herself or not having any more debate, or something to that effect.
Then leaving.
Pluto retained it's status.
It was short, I only half-remember it as I read it during the whole thing about demoting Pluto to Dwarf status. Sorry if I'm unclear on half-remembered details.