P-ko, the youngest sibling in a family comprising Q-taro, O-jiro, X-zō, and O-zetto, originates from the Obake world as the daughter of X-zō and O-zetto. Currently pursuing studies abroad in the human world, she shares a residence with Yukari Kawai—girlfriend of Shin’ichi Ohara, a middle school student from the Ohara family.

Renowned for her sharp intellect and gaming prowess, P-ko offsets her academic talents with comedic struggles in domestic chores, particularly cooking and sewing. Her striking appearance features a pale complexion, a lone strand of hair crowning her head, and a distinctive yellow-and-red checkered skirt. She stands at a height nearly identical to her younger brother, O-jiro.

Her social sphere includes friendships with Yukari, Shota Ohara, Shinichi Ohara, Doronpa, Yoshiko Koizumi, Tsuyoshi Saigo, Kizao Kiza, Hakase, and U-ko. Among them, Doronpa—an American ghost and rival to Q-taro—nurses an unreciprocated crush on her, their relationship hovering between camaraderie and undefined tension. Frequently entangled in her siblings’ escapades, particularly Q-taro’s mischief, P-ko navigates group dynamics with a blend of wit and resilience, though documented accounts offer no elaboration on specific narrative arcs.