Movie
Description
Princess Kakyu, also known by her guardian identity Sailor Kakyu, is the princess of the planet Kinmoku, a world located far beyond the solar system, and the first princess of the Tankei kingdom within that planet. Her homeworld and her character design are closely tied to the fragrant olive flower, since the Japanese word for that blossom, kinmokusei, inspired the name of her planet, and its scent and imagery appear throughout her story. Before the events of the film, Kinmoku is invaded and destroyed by Sailor Galaxia and the Shadow Galactica empire. Princess Kakyu is severely wounded in the attack and also loses her betrothed, who dies in the war against Galaxia. Weakened and grieving, she flees to Earth, where she hides within an incense burner that gives off the fragrance of fragrant olive. The mysterious child Chibi-Chibi finds and protects the burner, and Princess Kakyu remains concealed inside it while her body slowly heals.

During most of the story, the Sailor Starlights, the three guardian warriors who serve as her protectors, search desperately for her without knowing that she is already on Earth. When she finally emerges in full health, she reveals herself to Sailor Moon and the others, and she also discloses that Chibi-Chibi is herself a Sailor Guardian. Her motivation for coming to Earth is to find Sailor Moon, the legendary guardian she believes can help save the galaxy from Galaxia's campaign to steal the Sailor Crystals of warriors across the universe. She warns Sailor Moon that Galaxia is especially determined to obtain the Silver Moon Crystal, the core of Sailor Moon's power, and she joins the effort to confront the empire that destroyed her home.

In personality, Princess Kakyu is gentle, kind, and modest, with a dignified and noble bearing. She is not fond of conflict, and in many ways she resembles Sailor Moon in her warmth and compassion. Despite carrying the grief of losing her homeland and her beloved, she remains composed and quietly courageous, and she is deeply revered by the Sailor Starlights, who love and respect her for her character as much as for her royal position. Her faith is another defining trait: she believes in the true purpose and power of the Sailor Guardians, and she maintains that belief even at moments when Sailor Moon herself begins to lose hope. Her combination of tenacity and trust in others makes her an important figure in the final phase of the story.

In terms of her role, Princess Kakyu becomes the key link between the Sailor Starlights and Sailor Moon, and she acts as a source of knowledge and resolve during the fight against Shadow Galactica. She accompanies Sailor Moon, the Starlights, and Chibi-Chibi as they travel to confront Galaxia, and she is present when the other guardians fall one by one. After the Sailor Starlights are killed in battle by Galaxia's henchmen, Sailor Phi and Sailor Chi, Princess Kakyu announces her intention to fight as a guardian herself and transforms into Sailor Kakyu for the first time in the story. During the ensuing battle she is fatally wounded, and she dies in Sailor Moon's arms, expressing her wish to be reborn in a world without war so that she can be together with everyone she has lost. Her sacrifice and her enduring faith leave a strong impression on Sailor Moon and help carry her forward.

As a guardian, Princess Kakyu possesses power said to be comparable to that of Princess Serenity, and she has access to healing abilities similar to Sailor Moon's, allowing her to restore those whose star seeds have been taken without destroying them. In her Sailor Kakyu form, she wears a uniform closely resembling that of the Sailor Starlights and keeps her royal crown. She transforms using the phrase Kinmoku Star Power, Make Up, and her notable combat techniques include the Starlights Royal Straight Flush, which she performs together with the Sailor Starlights, and the attack known as Kinmoku Fusion Tempest, linked to the fragrant olive blossoms of her homeland. Her combat style also incorporates magical fortune-telling cards, reflecting the mystical traditions associated with her royal line.

Her development across the film moves from a hidden and wounded refugee to a revealed princess, and finally to an active warrior who chooses to fight even knowing the cost. She is ultimately revived, and together with the Sailor Starlights she departs once more to seek a new home, carrying forward her hope for a peaceful future.