Ohara teaches classical literature at Jusho High School, possessing striking, model-like beauty. Student Akemi Nakajima manipulates her into the CAI Room, where she is forcibly fitted with a specialized helmet connecting her consciousness to the digital realm and the demon Loki, resulting in non-consensual sexual assault witnessed by Nakajima and Yumiko Shirasagi. This trauma shatters Ohara's psyche, forging subservience to Loki. She masters Nakajima's demon summoning program, using it to fully materialize Loki in the human world and grant him free movement through computer networks. Her loyalty deepens, compelling her to deliver Yumiko to Loki as a demanded sacrifice despite Nakajima's protests. Witnessing Loki assault Yumiko in his gelatinous form triggers intense jealousy, driving Ohara into madness. After Yumiko and Nakajima escape, she aids Loki's teleportation to a nearby bank. When he doesn't return, her repeated attempts to contact him via the program inadvertently connect her to the demon Seth. Ohara carries Loki's child, a demonic embryo emitting a distinct presence detectable by magicians and demons. This connection steadily warps her physical form, imbuing her with traits of Loki's essence. In *Warrior of the Demon City*, Ohara attempts to delete the summoning program from the CAI Room computers to hide it. She is abducted by Isma Feed, who senses the demonic energy within her. Feed extracts the program and uses it to contact Seth. Under Feed's control, Ohara targets the families of Yumiko and Nakajima. The demonic embryo accelerates her metamorphosis into a half-demon state, manifesting bronzed skin and reptilian scales. In this form, she murders Yumiko's entire family and implants the demon Apep into Nakajima's mother. Nakajima injures Ohara during the ensuing confrontation, and Yumiko is forced to kill Nakajima's possessed mother. Ohara flees but is cornered in a swamp by Yumiko, who reluctantly uses her psychic abilities to kill her. After her death, the child she carried is possessed by Seth, transforming into an amoeba-like entity that captures Yumiko.