Okina is a young female commonly depicted between the ages thirteen and twenty, and may appear in human and anthro form. When she was a young girl, her family worked in the fields of Japan. Once while she was outside helping, she stumbled across a star ball in the weeds. Without knowing its origin or association, she took it back to her home thinking it was an expensive gem that could be sold at a high price.

That night the owner of the star ball, a ghost kitsune, wandered into the house to retrieve its stolen item. During the incident, Okina became possessed by the ghost fox unknowingly while her parents fell ill. Bad luck also entangled the family while they possessed the star ball.

After hearing the news of the family's disarray, Okina's eldest brother ventures back to the home and realizes that the expensive gem Okina found is actually a star ball that belongs to a fox. He also becomes aware that his young sister is possessed by a fox spirit after seeing the slight changes in her face and eyes, and the strange luminosity she carries at night. One night in particular, the brother tries coaxing the fox out which ends in disaster.

Okina winds up fleeing her home in the middle of the night fearing what people would do to her if they find out, and takes the star ball thinking that perhaps if she removes herself, her parents' illness will subside and their luck will return once more.

After leaving, Okina meets three grey kitsunes with mask-like faces who quickly become her companions and even protectors when needed. She also learns how to control foxfire and manifest illusions through different types of smoke. To match her companions' faces, she steals a white porcelain mask to hide her identity and unnerve travelers. She has inspired many stories of her appearance during her travels through the Japanese fields and forests.

Due to the events that transpired, Okina has become a quiet character who mostly communicates and interacts with her companions.