Character Relationship Map: Sky High

Characters

• Mina Saeki / Izuko (played by Yumiko Shaku) — protagonist

  Mina is Kohei Kanzaki's fiancée and a victim of the heart-removing murders. After her death, she encounters Izuko in the afterlife and must choose whether to ascend, remain as a ghost, or curse someon...

• Tatsuya Kudo (played by Takao Osawa) — supporting

  Tatsuya Kudo is a geneticist who is revealed to be one of the killers targeting the guardians of the afterlife gateway. Working with Rei Miwa, he seeks six hearts to open the Gate of Rage, summon demo...

• Sayuri Toyama (played by Aya Okamoto) — supporting
• Izuko (played by Eihi Shiina) — supporting

  Izuko is the guardian of the Gate of the afterlife. She meets Mina Saeki / Izuko after Mina's death and explains the three possible paths before her: rebirth in heaven, eternal existence as a ghost, o...

• Maya Ito (played by Maiko Yamada) — supporting

Canonical Relationships

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

• Mina Saeki / Izuko → Tatsuya Kudo (Romantic Lovers) — Their love motivates Tatsuya's determination, while Mina fears that revenge will condemn him.

  Tatsuya declares that he would fight the whole world to save the woman he loves, and Mina tries to stop him from seeking revenge.

Story Dynamics

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

• Izuko → Maya Ito (Narrative Afterlife Guide) — Izuko explains Maya's afterlife choices at the Gate.

  After Maya is killed, she arrives at the Gate of Rage, where its guardian Izuko explains the choices available to the dead.

• Tatsuya Kudo → Sayuri Toyama (Conflict Murder Investigator) — Sayuri's death is one of the murders connected to the case Tatsuya is investigating.

  Tatsuya investigates the heart-removal murders, and the final attack is planned at the concert hall where Sayuri was killed.

• Tatsuya Kudo → Maya Ito (Conflict Murder Investigator) — Maya's murder becomes part of the case Tatsuya pursues.

  Tatsuya investigates a series of murders after Maya is killed in the same manner as the other victims.

• Mina Saeki / Izuko → Sayuri Toyama (Alliance Fellow Gate Guardian) — They are connected through the victims' past roles as Gate guardians and the ritual targeting them.

  Mina learns that she and other victims were guardians of the Gate in previous lives; Sayuri is identified as a murder victim whose death site is targe...

• Mina Saeki / Izuko → Maya Ito (Alliance Fellow Gate Guardian) — Their connection comes from their shared history as guardians and their involvement in the murders linked to the Gate.

  Maya and Mina are identified among the dead women connected to the Gate, and Mina learns that she and other victims were guardians in previous lives.

• Mina Saeki / Izuko → Izuko (Narrative Afterlife Guide) — Izuko guides Mina through the choices she faces after death.

  After Mina dies, she encounters Izuko, who explains the possible paths available to the dead and gives her twelve days to decide.

Story Analysis

A murder investigation converges with the afterlife as Mina and Tatsuya confront a ritual threatening the Gate and a killer driven by the wish to restore his comatose wife.

Plot Progression

1. Murders and Afterlife Choices — Tatsuya investigates killings in which victims' hearts have been removed. Maya dies and encounters Izuko, who explains the paths available to the dead; Mina also dies and must make her own choice.
2. The Guardians' Past — As the murders continue, Mina learns that she and other victims were guardians of the Gate in previous lives. The dead warn that the killings are connected to a plan to break the Gate.
3. Ritual and Motive — The investigation and supernatural warnings force Tatsuya to consider that the warnings may be real. The killer's plan involves the Book of the Dead, demons, and a wish to awaken his comatose wife.
4. The Concert Hall Confrontation — The group learns that the ritual needs a final sacrifice and that the concert hall where Sayuri was killed is the planned site of the final attack. Mina and Tatsuya go there, where the confrontation b...