Character Relationship Map: Sadako

Characters

• Mayu Akikawa (played by Elaiza Ikeda) — protagonist

  Clinical psychologist and protagonist. Investigates her missing brother and a mysterious telekinetic girl linked to Sadako's curse. Travels to Oshima Island, learns the truth about the cave shrine, an...

• Yusuke Ishida (played by Takashi Tsukamoto) — protagonist

  Web marketing consultant assisting Mayu's brother with YouTube. Provides key intel on the restricted Oshima cave shrine and the cursed videotape urban legend. Accompanies Mayu into the cave and helps...

• Detective Otsuka (played by Asami Sanada) — supporting

  Investigative detective handling the Oshima cave incident and supernatural occurrences linked to Sadako.

• Oshima Police Officer (played by Tarō Suwa) — minor

  Local law enforcement officer stationed on Oshima Island, assisting with the cave investigation.

• Hatsuko Sofue (played by Rie Tomosaka) — supporting

  Clairvoyant mother who imprisoned her daughter in a closet, believing her to be Sadako's reincarnation. Dies in the resulting apartment fire, which inadvertently reignites the curse.

• Shizuko Yamamura / Sadako Yamamura (played by Ayaka Minami) — minor

  Reincarnated cursed spirit and central supernatural entity haunting the Yamamura family and beyond.

Key Relationships

• Detective Otsuka → Shizuko Yamamura / Sadako Yamamura (conflict)
• Oshima Police Officer → Shizuko Yamamura / Sadako Yamamura (narrative)
• Detective Otsuka → Oshima Police Officer (professional)
• Yusuke Ishida → Hatsuko Sofue (Social Indirect Connection)
• Yusuke Ishida → Shizuko Yamamura / Sadako Yamamura (Conflict Investigator Vs Entity)
• Mayu Akikawa → Hatsuko Sofue (Professional Patient's Guardian)
• Hatsuko Sofue → Shizuko Yamamura / Sadako Yamamura (Temporal Believer)
• Mayu Akikawa → Shizuko Yamamura / Sadako Yamamura (Conflict Arch Enemy)
• Mayu Akikawa → Yusuke Ishida (Alliance Partner)
• Oshima Police Officer → Shizuko Yamamura / Sadako Yamamura (conflict)

Story Analysis

A clinical psychologist uncovers a vengeful curse's origin while battling supernatural manifestations that claim those who investigate it.

Plot Progression

1. The Closet Confinement
2. Hospital Hauntings
3. Island Expedition
4. Cave Sacrifice & Curse