Guardian Pluto

She is a tiny, fairy-like being who floats on the air within a pink glow, otherwise resembling Super Sailor Pluto in full. Notably, she keeps that Super-form look even once Sailor Pluto herself has reached her Eternal state. The manga's monochrome art turns her glow into a plain circle around her with no readable tint, while Crystal traces the pink directly along her figure.

Like the others of her kind, she is a facet of the Sailor Guardian she watches over, belonging to Setsuna just as her Sailor Crystal does. She greets and confers rather than fights, serving as a guide and a point of contact at the moments her princess needs direction.

In the Dream chapters she appears in Elysion when Super Sailor Moon first raises the Holy Moon Chalice and the solar system soldiers take their princess forms. Floating ahead of Princess Pluto, she instructs her to send power from Charon Castle into the chalice, elevating Usagi to Eternal Sailor Moon and letting Setsuna's Pluto Crystal Power, Make Up unlock Eternal Sailor Pluto for the first time before she fades once the castle is summoned. In the Stars arc she welcomes Sailor Pluto to Charon Castle as Setsuna, Haruka, and Michiru move to raise a shield around the solar system. As the three confer remotely and study their data, they trace their enemy to the center of the Milky Way just as Sailor Galaxia arrives and slays Guardian Pluto together with Eternal Sailor Pluto. Sensing the danger, Hotaru rushes in with Guardian Saturn, but they come too late and perish as well.