TV-Series
Description
Kajitsu Momose is the younger sister of Yuuki Momose, both human reincarnations of Otherworlders. In past lives, she was the princess of the green world while Yuuki served as the king of the white world and her lover. This bond persists in their current existence, creating a star-crossed dynamic as siblings with lingering, complex emotions.

Kajitsu harbors the light of Mother Core within her. Upon its awakening, she gained communication abilities with insects and flowers, leading to inhumane treatment including experimentation and being treated "like an animal." In retaliation, she unleashed her powers to destroy their home, fleeing with Yuuki. During their escape, a storm-battered white rose became their symbol of purity, with Yuuki embodying this role as her protector.

Her demeanor appears emotionless and detached, masking fierce loyalty to Yuuki. Typically calm and gentle with a profound nature affinity, she turns intensely protective when Yuuki faces threats. This devotion fuels her actions, including serving the Otherworld King under Yuuki’s direction.

As a card battler, she wields a green deck emphasizing windstorm effects, though she initially used white cards. Key cards include The IronKnight Yggdrasil, The Providence Hououga, and The DoomKnightLord Ragna-Rock. She defeated Dan Bashin in their first duel; a rematch ended inconclusively when emotional turmoil over Yuuki caused her powers to spiral. Later, she and Yuuki jointly defeated Kurotaru using The DoomKnightLord Ragna-Rock.

Mother Core’s power deteriorates her health. Healing attempts, like energy gathering during the Grand Rolo Championship, worsened her suffering. After the green forest sanctuary was destroyed despite her pleas, she was moved between worlds for safety. When the Otherworld King, disguised as a Pantera doll, ambushed them, he fatally stole Mother Core’s symbol from her. Before dying, she and Yuuki vowed to reunite "in the next era." Her spirit later appeared during Dan’s final clash with the Otherworld King, and butterflies linked to her passed Yuuki as a final connection.

In *Battle Spirits Brave*, Kajitsu reincarnates as Flora Perfume, a Mazoku with a distinctive tail. Flora is adorably clumsy and cheerful but initially unaware of her past. She battles with a green deck against strong opponents, rarely winning. Yuuki’s reincarnation, Zolder, recognizes her, but their relationship remains unresolved due to differing human-Mazoku lifespans. Their bond endures into *Saga Brave*, where they live together a decade after *Brave*'s events.