Dwarf planet a draft resolution for the IAU definition of planet, both Pluto and Charon would have been considered dwarf planets in a binary system, given that they both satisfied the mass and shape requirements for dwarf planets and revolved around a common center of mass located between the two bodies (rather than within one of the bodies). The IAU currently states that Charon is not considered to be a dwarf planet and is just a satellite of Pluto, although the idea that Charon might qualify to be a dwarf planet in its own right may be considered at a later date.
Sailor Pluto doesn't display any personality traits associated with Scorpios despite being born under the sign; it seems to have been picked solely for its astrological significance. Also, according to Naoko Takeuchi's notes in the various artbooks, she mentions that "Setsuna wears hotpants as well at home, but basically she also likes long skirts" and that she believes "Setsuna should forever wear white clothes". The kanji of Setsuna's surname translates as and . Together, they constitute most of the name of the dwarf planet Pluto in Japanese: . Her given name is in hiragana and so its meaning is not inherent, but