sentences:  Minako is joined by Artemis, her feline advisor and Luna's partner.The Sailor Soldiers are often supported by the mysterious Tuxedo Mask whose civilian form is Mamoru Chiba, a college student with whom Usagi eventually becomes romantically involved.After continually thwarting the Dark Kingdom and defeating several of its generals, Usagi awakens as the moon princess — Princess Serenity — and acquires the Silver Crystal.