Space Knight is the alias King Endymion adopts in the Kaguya Island storyline of the Sailor Moon stage musicals. Traveling back from the future, he uses the disguise to shield his runaway daughter Chibiusa and the younger versions of his wife and their allies while they are cut off from their powers.
No detailed look for the Space Knight is on record; the identity functions above all as a cover that keeps King Endymion's true face hidden. Only once the final confrontation is underway does he shed the guise and reveal who he really is.
Everything the Space Knight does is rooted in a father's protectiveness. He trails Chibiusa across time to keep her safe and stands guard over the past incarnations of Neo-Queen Serenity and her companions during the stretch when they cannot call on their transformations.

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When Chibiusa fled her home and settled in with Usagi and Mamoru in the twentieth century, King Endymion pursued her to Kaguya Island under the Space Knight name. In that role he defended his daughter and her vulnerable allies, and after he came to Loof Merrow's aid against the servants of Coatl, she developed feelings for him and later repaid the debt by rescuing him in turn. During the climactic struggle with Dark Plasman he finally disclosed his identity, then made his way back to the thirtieth century together with Chibiusa. The part was played by Yuuta Mochizuki.
Space Knight is the alias King Endymion adopts in the Kaguya Island storyline of the Sailor Moon stage musicals. He travels back from the future to protect his daughter Chibiusa and the younger versions of his wife and their allies.
King Endymion disguises himself as the Space Knight to shield his runaway daughter Chibiusa and her younger allies while they are cut off from their powers. The identity keeps his true face hidden until the final confrontation.
As the Space Knight, King Endymion defends Chibiusa and her vulnerable friends and comes to the aid of Loof Merrow against the servants of Coatl. Loof Merrow develops feelings for him and later returns the favor by rescuing him.
The role of the Space Knight was played by Yuuta Mochizuki in Pretty Soldier Sailor Moon: The Legend of Kaguya Island. It marks the character's first appearance in the Sera Myu stage productions.
The Space Knight finally discloses that he is King Endymion during the climactic struggle with Dark Plasman. He then makes his way back to the thirtieth century together with Chibiusa.
Looking for more on Space Knight? The Sailor Moon Wiki on Fandom has a dedicated page with community notes.
View on FandomThis content is original writing by Daddy Jim Headquarters based on the Sailor Moon anime series, manga, and official materials. Sailor Moon was created by Naoko Takeuchi, published by Kodansha, and animated by Toei Animation. All rights to Sailor Moon and its characters belong to their respective owners. Episode and chapter references are cited where applicable.
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