Character Relationship Map: Ring 0

Characters

• Sadako Yamamura (played by Yukie Nakama) — protagonist

  A 19-year-old shamanic actress with nen powers who joins a troupe, causes supernatural events, is loved by Toyama, killed by the troupe, merges with a malevolent half, slaughters the remaining members...

• Hiroshi Tôyama (played by Seiichi Tanabe) — protagonist

  The troupe's sound director who develops a romantic relationship with Sadako. He is wounded by Shigemori, healed by Sadako, and later assassinated by her merged form.

• Etsuko Tachihara (played by Kumiko Aso) — supporting

  A costume designer with unrequited feelings for Toyama who investigates Sadako's background. She secretly plays recordings of Sadako's mother's demonstration, triggering a violent vision, and is later...

• Akiko Miyaji (played by Yoshiko Tanaka) — supporting

  An investigative reporter searching for Sadako's origins. She discovers photographs revealing Sadako's duality, hides in a cabin with Etsuko, and ultimately shoots both of them to escape Sadako.

• Shizuko Yamamura (played by Masako) — supporting

  Mother of Sadako, renowned ESP researcher whose madness and suicide shape Sadako's tragic origin.

• Yûsaku Shigemori (played by Takeshi Wakamatsu) — supporting

  The troupe director who becomes obsessed with Sadako, displacing Aiko. He threatens Sadako and is killed by a violent blow that also injures Toyama.

• Aiko Hazuki (played by Kaoru Okunuki) — supporting

  The lead actress whose relationship with Shigemori sours due to his favor for Sadako. She is found dead under mysterious circumstances, allowing Sadako to take her role.

• Heihachirô Ikuma (played by Daisuke Ban) — minor

  A doctor who harbors Sadako's malevolent half in his attic. He later drugs, murders, and throws Sadako into a well after she reunites with her dark side.

Canonical Relationships

Family, romantic, and professional connections based on plot evidence.

• Etsuko Tachihara → Hiroshi Tôyama (Romantic Unrequited Love) — Etsuko's feelings for Toyama are unreturned as he develops a relationship with Sadako.

  The plot says Etsuko harbors feelings for Toyama and is disappointed by his attraction to Sadako.

• Sadako Yamamura → Hiroshi Tôyama (Romantic Lovers) — They fall in love and plan a life together, but Sadako's merged form later kills Toyama.

  Sadako and Toyama confess their love after their final play and promise to leave the troupe and live together.

• Shizuko Yamamura → Sadako Yamamura (Family Mother) — Shizuko is Sadako's mother, and her history shapes the tragedy surrounding Sadako.

  The plot identifies Sadako as Shizuko's daughter and describes Shizuko's madness and suicide as part of Sadako's history.

Story Dynamics

Alliances, conflicts, and narrative interactions that evolve throughout the story.

• Heihachirô Ikuma → Sadako Yamamura (Conflict Captor And Murderer) — Ikuma ultimately murders Sadako and traps her in the well.

  Ikuma drugs Sadako, strikes her with an axe, throws her into a well, and seals her inside.

• Akiko Miyaji → Etsuko Tachihara (Alliance Temporary Allies) — They share a refuge during the pursuit, but Miyaji shoots Etsuko and herself rather than face Sadako.

  Miyaji and Etsuko hide together in an empty cabin in the woods while fleeing Sadako.

• Akiko Miyaji → Sadako Yamamura (Narrative Investigative Reporter) — Miyaji pursues the truth about Sadako and her supernatural duality.

  Miyaji investigates Sadako's origins, locates her in the troupe, and discovers photographs that support her suspicion of two Sadakos.

• Etsuko Tachihara → Sadako Yamamura (Conflict Investigator) — Etsuko investigates Sadako and contributes to the events that precipitate the troupe's violence.

  Etsuko wants to discover Sadako's origins, contacts Sadako's psychiatrist, and later plays recordings of Shizuko's demonstration that trigger Sadako's...

• Aiko Hazuki → Sadako Yamamura (Conflict Rival) — Aiko resents Sadako's growing favor and replacement of her in the troupe.

  Sadako's charisma infuriates Aiko, and Sadako takes Aiko's lead role after Aiko is found dead.

• Aiko Hazuki → Yûsaku Shigemori (Social Strained Relationship) — Shigemori's preference for Sadako damages his relationship with Aiko.

  The plot says Aiko's relationship with Shigemori sours after he favors Sadako.

• Yûsaku Shigemori → Hiroshi Tôyama (Conflict Violent Confrontation) — Toyama intervenes in Shigemori's confrontation with Sadako and is injured in the violence.

  Toyama interrupts Shigemori, and Shigemori is killed in a blow that also wounds Toyama.

• Yûsaku Shigemori → Sadako Yamamura (Conflict Obsession And Threat) — Shigemori's fixation turns threatening before he is killed.

  Shigemori becomes obsessed with Sadako and says he will kill her if she tries to kill him.

Story Analysis

Sadako's attempt to live among others collapses under fear of her powers, the revelation of her divided nature, and the violence that ends with her imprisonment in a well.

Plot Progression

1. The Past Beneath the Tape — A present-day confession about the cursed videotape frames the story. Miyaji investigates Shizuko's history, while a former teacher recalls Sadako's childhood and her prediction about a drowning.
2. Unease in the Theatre — Sadako joins the troupe and draws Shigemori's favor, aggravating Aiko. After Aiko's mysterious death, Sadako takes her role while her relationship with Toyama and the troupe's fear both grow.
3. The Photographs and the Promise — Miyaji's investigation and the photographs deepen the suspicion that there are two Sadakos. Shigemori dies, Sadako heals Toyama, and the lovers promise to leave the troupe together.
4. The Troupe's Collapse — Recordings of Shizuko's demonstration trigger Sadako's visions and violence. The troupe discovers Shigemori's body, attacks Sadako, and learns from Ikuma that she was split into two beings.
5. The Well's Sealed Ending — The two Sadakos merge, and the merged figure kills the troupe members, including Toyama. Miyaji and Etsuko meet a desperate end in the woods, while Ikuma murders Sadako and seals her in the well.