ChuChu fights as a key member of the Banipal Witt resistance against Princess Buburina's rule. She is DohDoh's younger sister; DohDoh, once wizard Master Sandada's apprentice, now serves Buburina due to a cursed portrait. Witnessing his transformation fuels her deep desire to free him from the enchantment.

A capable fighter, she actively participates in the resistance's strategic efforts to undermine Buburina and rescue victims of the balloon curse. Her determination manifests physically, like angrily waving her fist at DohDoh while demanding he break Buburina's control and think for himself.

Her initial interactions with Toriyasu are tense and marked by mutual dissatisfaction, stemming from his dismissive attitude upon arrival. Their relationship evolves into growing respect and cooperation through shared missions. A moment of separation during the infiltration of Buburina's castle leads to a reunion that visibly strengthens their bond. This culminates in their joint effort to subdue the monstrous Papadoll in the climactic air battle, showcasing their coordination.

ChuChu's motivations remain tightly bound to her familial connection. Protective instincts towards DohDoh drive her conflict against Buburina, persisting despite his transformation. After the main conflict resolves, her relationship with Toriyasu solidifies into friendship, with the Banipal Witt inhabitants extending an open invitation for future visits. She remains in Banipal Witt as the cats seek further help from the human children.