Kibushi belongs to Team Horse in the Akane Class, alongside Hinagiku and Oniyuri. She displays unwavering devotion to Hinagiku, constantly staying near her and openly declaring her cuteness. This fierce loyalty motivates her actions.

When the masked Rindou arrives, sparking rumors she might rival Hinagiku in cuteness, Kibushi joins a scheme to force Rindou to remove her mask. She helps lure Rindou under false pretenses and attempts to restrain her. The plan fails when Sazanka intervenes, leading to Kibushi and her teammates' capture.

Later, Kibushi grows alarmed as Hinagiku becomes distressed over Rindou's "Attractiveness Jutsu," which highlights cuteness. Believing a compliment from rival Benisumomo could console Hinagiku, Kibushi requests this favor. After Benisumomo refuses and further upsets Hinagiku, Kibushi confronts her and demands she leave, revealing her protective instinct.

Kibushi's loyalty faces a greater test when Hinagiku abruptly announces she is joining Team Sheep, claiming Team Horse is too dependent on her. Kibushi and Oniyuri initially react with distance, making Hinagiku believe they no longer value her. However, upon overhearing Hinagiku crying and learning Benisumomo might exploit her vulnerability, Kibushi and Oniyuri rush to rescue her. It is later revealed their earlier aloofness was a deliberate ruse to prepare a birthday surprise for Hinagiku, showcasing Kibushi's thoughtfulness and commitment to their friendship.

Her actions consistently center on supporting Hinagiku, whether through direct praise, defending her emotional well-being, or participating in covert efforts to maintain team bonds.