Kaname Oku works as the school nurse at Gokurakuin Academy, identifiable by her long orange hair, red eyes, labcoat, and necklace. Beyond the school walls, she leads a bosozoku biker gang. This dual existence positions her as both an educational authority and a prominent figure in street conflicts. She frequently rides a Harley-Davidson motorcycle with Saya Akabane, Aya Akabane's older sister, as her passenger. Together, they form a formidable partnership, confronting rival gangs and disrupting the streets. Their activities sometimes unwillingly involve Aya Akabane.

Kaname shares a close personal relationship with Saya Akabane, extending beyond gang life. This connection grants her informal access to the Akabane household, where she often enters unannounced to eat, visibly annoying and discomforting Aya. Aya exhibits significant fear towards Kaname, stemming from her intimidating presence and association with Saya. This dynamic persists during their interactions. One notable incident occurs during a pool event where Kaname rescues a nearly drowning Aya by administering CPR, resulting in an unintended kiss that further complicates Aya's perception of her.

Kaname's personality blends assertiveness and unpredictability, reflecting her comfort in both the structured school environment and the volatile world of biker gangs. Her actions, such as barging into private spaces or instigating street conflicts, demonstrate a disregard for conventional boundaries. Her role consistently generates comedic tension through her dual life and the fear she instills in Aya.