Usagi Tsukino, known as Bunny in some English manga versions, begins as an ordinary middle school student in Tokyo's Azabu-Jūban district. Her life changes irrevocably when Luna, a talking black cat, discloses her destiny as Sailor Moon, the reincarnated Princess Serenity of the ancient Moon Kingdom. This heritage binds her to the powerful Silver Crystal and defines her role as Guardian of Love and Justice. Her civilian identity shows a carefree, accident-prone teenager with poor study habits and a tendency to cry easily. She lives with her parents, Kenji and Ikuko Tsukino, and younger brother Shingo. Early portrayals highlight immaturity and reluctance towards her responsibilities, counterbalanced by innate kindness and compassion. As Sailor Moon, she initially depends on allies like Tuxedo Mask (Mamoru Chiba), later revealed as her past-life lover Prince Endymion. Their relationship evolves from antagonism to deep romance, embodying themes of destined love across lifetimes. Her character development spans multiple arcs, maturing from a self-described "crybaby" into a decisive leader who embraces her duties while retaining core optimism. Key growth involves reconciling her human identity with her past as Princess Serenity and her future as Neo-Queen Serenity, ruler of 30th-century Earth. This includes accepting her role as mother to Chibiusa (Sailor Chibi Moon), who travels from the future to train with her. Her powers and transformations evolve significantly: Base abilities include a tiara weapon and attacks like "Moon Tiara Action," later advanced via the Crystal Star and Cosmic Heart Compact. As Super Sailor Moon, she gains a multicolored skirt, enhanced healing, and the "Moon Spiral Heart Attack." Her Eternal Sailor Moon form features angelic wings, a triple-layered skirt, and the Silver Crystal's full reality-altering potential. Her abilities prioritize purification and healing over destruction, reflecting her belief in redemption. Personality traits encompass unwavering empathy, often leading to self-sacrifice to protect others. She consistently seeks nonviolent resolutions, even for brainwashed civilians or antagonists. Gluttony (especially for sweets) and romantic daydreams provide levity, while her loyalty to friends and family remains foundational. Her leadership emerges through unifying the Sailor Guardians, including outer-system allies like Sailor Uranus and Neptune. In spin-offs like Codename: Sailor V (featuring Sailor Venus), she appears briefly, confirming her status as the central figure of the Guardian mythology. Movies and OVAs, such as the Make Up! Sailor Guardians short, reiterate her core identity without introducing new backstory.