Chuchu is a main character and the leader of the band Plasmagica. She is a rabbit-like Myumon, a species in her world, distinguished by her pale pink rabbit ears and a small, fluffy white tail. Her appearance features long, pale lilac hair styled with curled ends and straight-cut bangs, framing soft rose-colored eyes. She typically wears a black dress with purple accents and a large lavender bow, paired with indigo heels and leg warmers. She plays a guitar she has named the Antique Batman.

In terms of personality, Chuchu carries herself as a well-mannered, classy, and sociable honor student who is often seen as the reliable leader of her band. She maintains a polite and respectful mode of speech. While she presents a friendly and charismatic exterior, she possesses a highly ambitious and competitive inner drive. She is a dedicated perfectionist, practicing her guitar daily and taking music extremely seriously. This seriousness extends to her worldview; she does not believe in luck, fortune-telling, or supernatural powers, and is adamant that achieving one's dreams requires nothing but passion, effort, and determination.

Chuchu's primary motivation is a deep-seated dream of achieving solo stardom. Initially, she views her role in Plasmagica as a strategic stepping-stone to launch her own solo career, a secret she keeps from her bandmates. This ambition is fueled by a desire for personal success and recognition, inspired by a musician who greatly influenced her.

Her role in the story is central to Plasmagica's dynamic. She is not only the band's leader and a guitarist but also one of its vocalists. Her relationship with the other members is complex. While she deeply cherishes and values her friends in the band, she struggles with jealousy, particularly towards the band's other guitarist, Cyan. When Cyan joins Plasmagica, Chuchu feels that the attention she once commanded is being redirected, which intensifies her insecurity and competitive feelings.

This internal conflict leads to a significant development in her character arc. Her unchecked jealousy and ambition make her vulnerable to the villain Dagger Morse, who brainwashes her in an attempt to use her for his own plans. She becomes the first of her band to fall under his control. However, she is ultimately rescued by the power of music and the genuine bond she shares with her bandmates, who perform a song she herself wrote to reach her. This experience forces her to confront her flaws. She admits that her feelings of jealousy were real, but she also learns that her connection to the band is more important than her selfish ambitions, and she decides to remain with them. Beyond her musical talents, she is also implied to be the only member of her group with domestic skills, such as baking.