Usada Hikaru, chiefly recognized by her stage name Rabi~en~Rose, is a 14-year-old human girl of French-Japanese descent in specific adaptations. Her birth name, Hikaru Usada—a pun on singer Hikaru Utada—is strongly disliked when used. The surname "Usada" originates from "usagi" (rabbit), while her alias merges "rabbit" with the French phrase "La Vie en Rose," evoking a rose-tinted perspective on life. Born August 30, 1985, she lives on Earth and stands 164 cm tall, including her heels. Her distinct appearance showcases rose-pink twintails with large dice-shaped hair ornaments, rose-red eyes, and a signature bunnygirl outfit: a light pink waitress-style dress with ribbons, purple high-heeled shoes, oversized white rabbit ears, and a cotton tail. A 2007 redesign briefly shifted her eyes to blue and warmed her color palette, reverted to the original in 2013. Her parents, Mr. Usada and Gertrude Usada I, encouraged her idol aspirations by having her live independently. She supports herself through multiple jobs, including distributing promotional tissues for her father’s beauty salon, "Charisma," where she resides. Extended family includes cousins: 17-year-old idol Akari Usada, Miyako Usada, another Akari Usada, and deceased relatives Juri Usada, Gertrude Usada II, and Koji Usada. Personality-wise, she is bossy and intensely competitive toward protagonist Dejiko, whom she deems a rival. Despite this friction, she secretly yearns for Dejiko’s friendship and displays underlying kindness. She transforms into Rabi~en~Rose using dice, a process involving a costume change inside a portable rabbit-eared box. Her abilities include "Rabbit Ears Propella," enabling flight via her bunny ears. Unlike franchise kemonomimi peers, she avoids animal-themed verbal tics. Characterization fluctuates across series: in *Panyo Panyo Di Gi Charat*, she appears kinder; in *Winter Garden*, she leads a cheerleading club. During the *Ohanami Special*, she risks her life obtaining rare fruit to cure Dejiko’s illness, only for Dejiko to mock her real name in response. Romantic interests encompass a crush on classmate Kiyoshi Omocha (14, Bobo Junior High School) and references to a boyfriend named Minataku or Minagawa. Her driving ambition is idol stardom, persistently thwarted by comedic misfortunes and financial hardship.