Kaori Asakura presents a serious and inquisitive persona as a reporter for "News Presence," characterized by green shoulder-length hair, green eyes, and measurements of 85-58-83 cm. She typically dons a light green dress with a yellow undershirt and beaded necklace, though her attire became less revealing in the remake.

Beyond her journalism, Kaori covertly operates as an industrial spy for Kouzou Ryuuzouji, probing unusual lightning strikes at Sakaimachi beach tied to Geo Technics, managed by Ayumi Arima. Her objective is to steal the "Power Stone" formula and a crystal sample—research linked to Ayumi's late husband, Kodai Arima. She collaborates with Geo Technics employee Hideo Toyotomi but intends to betray him upon securing the materials.

Kaori once briefly involved herself romantically with Kodai Arima and later manipulates his son, Takuya, using charm and conversation to extract a keycard for lab access. When Takuya uncovers her espionage through parallel-world insights, he compels her to reveal Power Stone intelligence before security interrupts; she escapes, leaving her fate unresolved.

In the anime adaptation, Kaori poses as a Sakaimachi Academy student wearing Mio Shimazu's uniform, leads a date club, and part-times with Kanna Hatano—diverging from her reporter role. The original OVA retains her journalism identity but omits espionage and Power Stone ties. Across adaptations, she consistently merges public professionalism with covert ambition. Her age remains unspecified.