Fourteen-year-old Japanese schoolgirl Usagi Tsukino resides in Tokyo's Azabu-Jūban district with her mother Ikuko, father Kenji, and younger brother Shingo. Her civilian appearance features blue eyes, porcelain skin, and long blonde hair styled in distinctive odango pigtails. She wears a middle school uniform with a blue sailor collar, white blouse, pleated skirt, and black Mary Jane shoes, later transitioning to a darker high school uniform. Her life transforms upon encountering Luna, a talking black cat marked with a crescent moon. Luna reveals Usagi's destiny as Sailor Moon, reincarnated Guardian of Love and Justice from the ancient Moon Kingdom. Luna grants her a Transformation Brooch, enabling her transformation into Sailor Moon—a warrior in a white leotard with sailor collar, chest armor, crescent moon accessories, and knee-high boots. This form evolves: Moon Cosmic Power adds a Cosmic Heart Compact and altered tiara; Super Sailor Moon incorporates wing-like elements, a gradient skirt, and a second Cosmic Heart Compact; Eternal Sailor Moon replaces chest armor with angel-wing motifs, layered skirts, and gold celestial symbols. Initially immature, Usagi struggles academically, displays clumsiness, emotional volatility, and avoids responsibilities. Her hobbies include eating sweets, reading manga, playing video games, and sleeping. Despite this, her profound kindness defines her—demonstrated by defending Luna from bullies—and she maintains unwavering faith in others' inherent goodness. This compassion drives her refusal to kill enemies, instead seeking to heal corrupted humans. Her journey spans multiple conflicts. In the Dark Kingdom arc, she awakens as Sailor Moon, discovers her past life as Princess Serenity (a lunar princess in flowing white gowns), and reunites with past lover Mamoru Chiba (Tuxedo Mask). She sacrifices herself alongside her Guardians against Queen Metaria, resurrecting them with the Silver Crystal. During the Black Moon arc, she meets future daughter Chibiusa from 30th-century Crystal Tokyo and battles the Black Moon Clan, culminating in her awakening as Neo-Queen Serenity and upgrading her Guardians' Planet Powers. In the Death Busters arc, she allies with outer Guardians (Sailors Uranus, Neptune, Pluto, Saturn) against the Death Busters. Achieving Super Sailor Moon, she heals Tokyo after Pharaoh 90's defeat and ensures Hotaru Tomoe/Sailor Saturn's rebirth. The Dream arc (adapted in *Sailor Moon Eternal*) sees her unlock Eternal Sailor Moon to rescue Mamoru from the Dead Moon Circus, solidifying her future as Neo-Queen Serenity. The Stars arc (adapted in *Sailor Moon Cosmos*) reveals her as the "Messiah of Silence" destined to reset the universe, confronting Shadow Galactica with Lambda Power. Key relationships shape her growth: her rivalry-turned-romance with Mamoru (future husband); her sister-like bond with Chibiusa; and her leadership of the Sailor Guardians, evolving from reliance on Luna to strategic autonomy. She matures into a resolute protector while retaining core empathy, prioritizing redemption over annihilation. Her name "Tsukino Usagi" is a deliberate pun meaning "Rabbit of the Moon," referencing Asian folklore.