Neko Kamimoku attends Roubai Girls' Academy as a first-year in Class 1-3, occupying seat number 4. Her given name blends "root" (根) and "child" (子), while her surname Kamimoku fuses "deity" (神) and "silence" (黙). She resides in the Mangetsu Dormitory, rooming with Touko Usagihara.

Physically, she possesses long black hair extending to her chest and distinctive gray eyes. Her perpetually drowsy disposition manifests through heavy-lidded, half-closed eyes that rarely open fully. Teachers routinely scold her for dozing during lessons, as she drifts off easily and sleeps deeply, undisturbed by noise and challenging to rouse. Her sleepiness occasionally proves contagious to others.

Contrasting her habitual lethargy, she exhibits sharp focus and discipline in the archery club. When gripping a bow, her entire bearing shifts to reveal intense concentration and quiet dignity during kyudo practice.

She participates in school events like the athletics festival, learning to craft cheerleading pompoms and joining practice sessions alongside classmates such as Komichi Akebi and Kei Tanigawa, maintaining a supportive role throughout these activities.