Yukinojō Tachibana serves as the seventh-generation successor of the prestigious Kunitachiya kabuki family, destined to uphold its traditions as an onnagata specializing in female roles. Born on July 9, he defied strong parental opposition to secretly enroll at Edel Rose Academy and pursue Prism Star activities, concealing this dual life from the kabuki world. This choice ignited significant familial conflict, with his father pressuring him to abandon Prism Shows for exclusive focus on kabuki. A pivotal revelation occurs when his mother discloses that his father, not born into the Tachibana family, earned his place through dedication – a parallel to Yukinojō's passion for Prism Shows. Witnessing his son's Prism Show performance ultimately leads to the father's acceptance.

Physically, Yukinojō exhibits an androgynous appearance: long red hair often secured in a low side ponytail with a blue ribbon, accented by a traditional Japanese hair accessory above his ear. His fair skin, sharp blue eyes, and use of red eyeshadow and lipstick during performances contribute to frequent initial misgendering, as experienced by Shin Ichijō. Offstage, he maintains a reserved, calm demeanor, rarely displaying overt emotions—a trait cultivated by his kabuki upbringing. This contrasts sharply with his expressive stage presence, channeling expertise in feminine grace. His personality reflects an internal conflict between tradition and self-expression, finding liberation through Prism Shows.

Key relationships include Leo Saionji, who intensely admires him, addressing him as "Yuki-sama." Yukinojō mentors Leo, offering advice while remaining humble. His Prism Show performances seamlessly integrate kabuki aesthetics, featuring elaborate kimono costumes and thematic songs such as "Hyakka Ryoran" and "Ageha Chou, Yume Mai Koi Shigure." Technically accomplished, he achieves four consecutive Prism Jumps—a rare feat shared only with Hiro Hayami and Louis Kisaragi. His highest achievement occurs during the Prism 1 Grand Prix; his solo performance scores 9070 karats, securing Edel Rose's early lead and solidifying his father's approval to continue Prism activities.

His character arc resolves by reconciling kabuki heritage with Prism Star ambitions, culminating in performances that blend both art forms. He owns a teddy bear named Andy, collects Western hard rock albums, sleeps in a yukata, and possesses limited cooking skills—particularly with rice preparation. He is affiliated with the unit SePTENTRION and represents the "Sexy" brand style in Prism Shows.