Aiko Hazuki is a character from the Japanese horror narrative Ring Ø: Birthday, where she serves as a pivotal figure within a Tokyo theatre troupe. Her background is that of an aspiring actress, and at the outset of the story, she holds the position of lead actress in the troupe's production. Aiko's role in the story is primarily as a catalyst for the central conflict. During a rehearsal, she is mysteriously struck down and dies, an event that sets a series of supernatural occurrences into motion. Her death is not merely a tragic incident but a key plot point that deepens the mystery surrounding another troupe member, Sadako Yamamura. Following her death, strange phenomena are reported, including the sound man hearing peculiar noises on the audio tapes, specifically at the moment in the play where Aiko died, and discovering that Aiko's voice can be heard on the recording. This connection between her demise and the unsettling audio elements links her fate directly to the story's central curse. Aiko Hazuki's key relationships are primarily with her fellow theatre troupe members, including the director and the sound man, Toyama, who is one of the few to support the outcast Sadako. Her sudden death creates a climate of fear and suspicion, influencing the actions and motivations of other characters as they try to understand what happened. Her character development is limited as she dies early in the narrative; however, her death is a transformative event for the story, serving as the inciting incident that reveals the terrifying powers at play. Her notable abilities are not those of a living person but rather a supernatural phenomenon; her voice persists on the sound tape after her death, indicating that her presence continues to haunt the production from beyond the grave. This manifestation is a crucial element of the horror, as it demonstrates how a violent and tragic event can leave a lasting, malignant imprint.