Guardian Cosmos
Gādian Kosumosu
M guardiancosmos
Full Name

Guardian Cosmos


Galaxy Cauldron

Resides in

Galaxy Cauldron


Guardian of the Cosmos Crystal


Usagi Tsukino





First Appearance

Act 60 - Stars 11

Guardian Cosmos is the guardian of the Cosmos Crystal who resides in the Galaxy Cauldron. She only appears once in the very last chapter of the manga.



Guardian Cosmos is a small woman spirit with very long hair who wears a long transparant dress decorated with beads. She wears a tiara accessory on her head and carries a staff.


Stars arc

Sailor Moon dives into the Galaxy Cauldron to rescue her loved ones, sacrificing and expecting to melt away like all others who have fallen into the Cauldron. Her body remains whole and she is immediately greeted by a small figure of a woman. The woman introduces herself as Guardian Cosmos, the guardian and holy spirit of the Cosmos seed. She wonders aloud if Usagi and the others wish to begin a new history of the stars, and leave the Cauldron in their star forms, but Usagi tells her that no matter how hard it will be, she wishes to return to the way she and her friends knew each other, so that they may continue to live on together as friends.

They were encased in light and begin to float away. As they float away, Usagi calls out to Guardian Cosmos, saying, "Is Chaos...?" but is cut off, and disappears. After she disappears, Guardian Cosmos says, "The core of Chaos, the Chaos seed, and Guardian Chaos, are melted into the Cauldron. Now they have become too small to be found. They might be born again, because this is the place where stars, and possibilities, are born..." Guardian Cosmos is often incorrectly called the "Cauldron Guardian." While she IS the guardian of the Cauldron, she gives her name as Guardian Cosmos, and this is what she should be called. Contrary to popular belief, the Cauldron Guardian is NOT Chaos.


  • This encounter bears some notable similarities with the Disney film The Black Cauldron. SPOILER: The witches who guard the eponymous object reveal to the heroes that the only way to stop the Cauldron from being used by the force of evil is for one of them to dive into it. However, once this act of self-sacrifice has been performed, the guardian witches reveal to the surviving heroes that they will be rewarded with a wish, which can be used to return their sacrificed friend to their normal, living form.  


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