Emiya Tachi, alias Prime Rose, begins as a princess of Guroman, forced into hiding under her new identity following the exile of her father, King Abumis. Raised by commoners in Kukurit, she matures into a self-absorbed high school student courted by Prince Pirar until her involvement with anti-regime resistance marks her as a fugitive. A pivotal moment—witnessing the execution of a loved one—fuels her defiance. Trained in swordplay and combat by her father, operating under the name Jinba, she battles in black bikini armor and wields the ability to temporarily petrify her body.

The manga traces her journey from student to revolutionary leader, clad in a scant battle suit as she uncovers her royal roots and allies with resistance figure Tanbara Gai to dismantle Guroman’s corruption. The anime reimagines her arc through time travel, plunging her into a fractured future where she joins time patrol agents to thwart a demonic force manipulating warring city-states, underscoring her tactical prowess.

In *Astro Boy: Omega Factor*, her narrative takes a sharp turn: hospitalized with Dolmehka Syndrome as Daichi Tokugawa’s girlfriend, she is covertly transported to the moon disguised as a robot. Radiation from Omotanium triggers her hibernation until Dr. Black Jack revives her three years later, dispelling her father’s grief-stricken misconception of her death.

Brash and innately commanding, she oscillates between civilian roles as a politician’s daughter and a fashion influencer within the Osamu Tezuka Star System. Visually, her manga persona features spiked hair and a school uniform, while the anime grants her purple locks and a mature demeanor against an ancient-future backdrop. Her story arcs consistently grapple with shedding her manipulated past to embrace leadership, straddling the duality of royal heritage and insurgent defiance.