Why Pluto’s new classification wouldn’t make a difference to Sailor Pluto
After the planet Pluto was reclassified as a dwarf planetoid, a ton of people started making comments about Sailor Pluto no longer being a sailor senshi.
Every time I see one, a part of me dies inside.
First, when Pluto was reclassified, it wasn’t because we learned anything new or shocking about Pluto - it was because we discovered a ton of Pluto-sized objects in the outer solar system. There were two options: either include a ridiculously high amount of objects to our list of planets, or come up with a new definition of “planet” and a new term for objects like Pluto. The latter was determined to be the simpler solution, so that’s what we went with.
While all sailor senshi are associated with some kind of celestial objects, they’re not all associated with planets - in the anime, we have Sailor Moon herself, as well as the Sailor Starlights who appear to be associated with actual stars. In the manga, we have the asteroid senshi.
Similarly, there’s no reason to think that Sailor Pluto should be less powerful because she’s associated with a planetoid. Sailor Moon is explicitly shown to be the most powerful sailor senshi in the series, and the moon isn’t even close to the largest non-sun object in our solar system (that would be Jupiter). Obviously, size ≠ power.
If anything would warrant change, it would be her henshin phrase (“Pluto Planet Power”), but that would be it.