Kyōko Mogami is the protagonist of the story, a sixteen-year-old girl whose life takes a drastic turn when she discovers the true nature of her childhood friend and romantic interest, Shōtarō “Shō” Fuwa. Having moved to Tokyo with him to support his rise as a pop idol, Kyōko initially abandons her own education and ambitions, working long hours at a convenience store and performing all domestic chores for Shō. Her background is marked by a lonely childhood: her parents divorced when she was young, and her mother, deeply resentful of caring for Kyōko alone, sent her to live with the Fuwa family. This rejection left Kyōko with a deep-seated fear of abandonment and a desperate need to be loved and needed, which she poured entirely into serving Shō.

In terms of personality, Kyōko is initially portrayed as a self-sacrificing, earnest, and somewhat naïve young woman, conditioned to suppress her own desires. However, the moment she overhears Shō dismiss her as a mere housekeeper with no real worth, her personality undergoes a dramatic shift. Her repressed anger and hurt manifest as a powerful, theatrical aura of vengeance. She becomes intensely passionate, stubborn, and driven, channeling her emotions into a cold, calculated fury against Shō. Underneath this vengeful exterior, Kyōko remains fundamentally kind, empathetic, and loyal, though she often hides these softer traits behind a fierce, prideful facade. She struggles with low self-esteem rooted in her mother’s rejection, frequently expressing disbelief that anyone could truly value her for herself rather than as a tool. Over time, she develops a wicked sense of humor, a flair for dramatic exaggeration, and an almost supernatural ability to hold grudges.

Kyōko’s primary motivation shifts from winning Shō’s love to surpassing him in the entertainment industry as a form of revenge. After cutting all ties with him, she auditions for the talent agency LME, intending to become an idol to prove her worth. When her initial, overly enthusiastic audition fails, she is taken in by the agency’s president’s unconventional program, the Love Me section, which aims to teach true love and devotion to the craft. Her role in the story is that of a relentless underdog, refusing to give up despite repeated setbacks and her own inexperience. Her journey centers on discovering her own identity and talent, moving from revenge-driven anger to genuine passion for acting as an art form.

Key relationships define much of Kyōko’s development. Her relationship with Shō Fuwa is the initial catalyst: she moves from blind devotion to burning hatred, though occasional glimpses of their shared past complicate her feelings. Her rivalry and later friendship with fellow Love Me member Kotonami Kanae (Moko) provide her with a peer who respects her abilities and pushes her to improve. The most complex bond is with her senpai and eventual love interest, Ren Tsuruga, a top actor whose real identity as her childhood “Corn” (a fairy she befriended as a child) she does not recognize. Ren becomes her mentor, rival, and emotional anchor, helping her grow as an actress while she inadvertently breaks through his own emotional walls. Her relationship with LME’s president, Lory Takarada, is paternalistic and eccentric; he sees her potential for “love” and encourages her growth.

Kyōko’s development is central to the narrative. She evolves from a girl who defines herself through others into a self-possessed young woman who values her own achievements. Initially unable to act onstage without channeling real emotions like hatred or revenge, she learns to create characters from empathy and imagination. She moves from viewing acting as a weapon against Shō to embracing it as a way to understand herself and others. Her emotional range expands dramatically, allowing her to portray deeply tragic, joyful, or sinister roles. She also begins to recognize her own worth, slowly accepting friendship and romantic possibilities without assuming she deserves nothing.

Notable abilities include her extraordinary capacity for emotional immersion, which she calls “grudge energy”—a dark, tangible aura born from deep resentment that she can use to power her performances, especially in villainous or vengeful roles. Over time, she learns to control and refine this ability into versatile acting chops. She has a photographic memory for scripts and stage directions after reading them only once. Physically, she possesses remarkable stamina and flexibility from years of domestic labor and later from rigorous training. She also displays unexpected skills like convincing disguise work, improvisational courage under pressure, and a talent for making elaborate, high-quality homemade props and costumes, a result of her self-sufficient upbringing. Despite her late start in acting, her raw, intuitive understanding of emotion allows her to compete with and sometimes surpass seasoned performers.