Sadako Yamamura (played by Yukie Nakama) is a protagonist in Ring 0.
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, and is ultimately murdered by Dr. Ikuma and sealed in a well. Etsuko Tachihara (played by Kumiko Aso) appears in Ring 0.
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 shot by Miyaji during a standoff. Akiko Miyaji (played by Yoshiko Tanaka) appears in Ring 0.
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) appears in Ring 0.
Mother of Sadako, renowned ESP researcher whose madness and suicide shape Sadako's tragic origin. Yûsaku Shigemori (played by Takeshi Wakamatsu) appears in Ring 0.
The troupe director who becomes obsessed with Sadako, displacing Aiko. He threatens Sadako and is killed by a violent blow that also injures Toyama. Gekidan Kenkyûsei (played by Yoshiyuki Morishita) appears in Ring 0.
Acting troupe where teenage Sadako performs, serving as the primary setting for supernatural events. Kaoru Arima (played by Atsuko Takahata) appears in Ring 0.
Minor cast member or troupe associate appearing briefly in the film's narrative. Dansei Kyôyu (uncredited) (played by Yoji Tanaka) appears in Ring 0.
Uncredited male teacher or academic figure with a brief background appearance.
Ring 0 (2000) character relationship network mapped with AI analysis. Explore the connections, alliances, and conflicts between characters.
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...
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.
Gekidan Kenkyûsei
(played by Yoshiyuki Morishita) — minor
Acting troupe where teenage Sadako performs, serving as the primary setting for supernatural events.
Kaoru Arima
(played by Atsuko Takahata) — minor
Minor cast member or troupe associate appearing briefly in the film's narrative.
Dansei Kyôyu (uncredited)
(played by Yoji Tanaka) — minor
Uncredited male teacher or academic figure with a brief background appearance.
A supernatural thriller tracing Sadako's tragic origins, supernatural escalation, and ultimate containment through psychological and physical violence.
