Kohane Hatoya possesses a naturally helpful personality, frequently assisting others even at personal risk of injury due to chronic hero syndrome, which drives her to intervene regardless of her own capabilities. Her surname incorporates kanji meaning "pigeon," aligning with the series' animal theme naming convention.

A pivotal childhood incident involved her jumping from a swing set attempting to fly, resulting in hospitalization. Witnessing her parents' distress at her bedside instilled lasting acrophobia rooted primarily in anxiety about causing loved ones worry, not the physical pain itself. She occasionally overcomes this fear temporarily through "cheer power," an internal motivational energy she believes in.

Her passion for cheerleading ignited upon seeing Hizume Arima perform before high school entrance. Recognizing it as a method to uplift others, she resolved to establish a cheer club at Kaminoki High. Discovering no existing club, she founded the Cheer Association alongside childhood friend Uki Sawatari and reluctant veteran Hizume. Kohane frequently mispronounced "cheer" as "chair" early on, creating recurring humor.

Within club activities, Kohane exhibits unwavering enthusiasm, often sleeping with pom-poms nearby. Despite lacking initial physical prowess or flexibility, her dedication to training under Hizume's guidance gradually improved her skills. Her small stature eventually designated her as the primary flyer in stunts, directly conflicting with her acrophobia. This position necessitated confronting her fears incrementally through basic pyramids and thigh stands during performances for school teams and local festivals.

Her development extended beyond technical skills. She later assumed the club presidency, taking on responsibilities like budget management and logistical planning. Her influence reached beyond cheerleading; she assisted classmate Kon Akitsune in a successful same-sex confession by adapting strategies after learning the crush's gender, and persistently encouraged timid classmate Kotetsu Tatejima to join. Kohane's energetic support during a soccer match featuring Uki's brother Akane changed his negative perception of cheerleading after he witnessed their performance's impact.

During a cheer tournament storyline, Kohane prioritized team cohesion when Hizume encountered former teammates. Despite preliminary elimination, her focus on mutual support strengthened the group's resolve to continue improving. Her optimism persistently united members through collaborative challenges like handmade uniform creation, fundraising activities, and summer training camps.