Saori Mugino (played by Sakura Ando) is a protagonist in Monster.
Single mother of fifth grader Minato. Highly protective and suspicious of teacher Michitoshi Hori after Minato exhibits distress. She confronts the school faculty and Hori directly, leading to Hori's temporary firing. Later, she partners with Hori to search for the missing Minato in an abandoned train tunnel. Minato Mugino (played by Soya Kurokawa) is a protagonist in Monster.
Fifth-grade student and Saori's son. His behavioral changes stem from a secret romantic bond with classmate Yori and a need to protect him from bullies. He struggles with guilt over his deceased father and his own identity, ultimately escaping with Yori to an abandoned railcar hideout. Yori Hoshikawa (played by Hinata Hiiragi) appears in Monster.
Classmate of Minato who is bullied for his asocial behavior. He shares a deep romantic relationship with Minato, which adults misinterpret as bullying. Suffering under the abuse of his alcoholic father, he is found injured during a storm and escapes with Minato to find safety. Michitoshi Hori (played by Eita Nagayama) appears in Monster.
Minato and Yori's fifth-grade teacher. Initially suspected of abuse, he is unfairly forced to resign by school administrators protecting their reputation. After discovering the boys' true relationship and the abuse they face, he seeks forgiveness and helps Saori locate the missing children in a tunnel. Makiko Fushimi (played by Yuko Tanaka) appears in Monster.
A school administrator who initially pressures staff to suppress incidents to protect the school's image. Later, she confronts her complicity in her grandchild's death and personally encourages Minato to choose his own happiness over past trauma. Makiko's Husband (played by Shiyun Nakamura) appears in Monster.
Kiyotaka Hoshikawa (played by Shido Nakamura) appears in Monster.
Yori's alcoholic father. Highly abusive and controlling, he attempts to forcibly 'cure' his son's behavior. His violent outbursts and neglect directly drive Yori and Minato to flee together during a heavy rainstorm.
Monster (2023) character relationship network mapped with AI analysis. Explore the connections, alliances, and conflicts between characters.
Characters
Saori Mugino
(played by Sakura Ando) — protagonist
Single mother of fifth grader Minato. Highly protective and suspicious of teacher Michitoshi Hori after Minato exhibits distress. She confronts the school faculty and Hori directly, leading to Hori's...
Minato Mugino
(played by Soya Kurokawa) — protagonist
Fifth-grade student and Saori's son. His behavioral changes stem from a secret romantic bond with classmate Yori and a need to protect him from bullies. He struggles with guilt over his deceased fathe...
Yori Hoshikawa
(played by Hinata Hiiragi) — supporting
Classmate of Minato who is bullied for his asocial behavior. He shares a deep romantic relationship with Minato, which adults misinterpret as bullying. Suffering under the abuse of his alcoholic fathe...
Michitoshi Hori
(played by Eita Nagayama) — supporting
Minato and Yori's fifth-grade teacher. Initially suspected of abuse, he is unfairly forced to resign by school administrators protecting their reputation. After discovering the boys' true relationship...
Makiko Fushimi
(played by Yuko Tanaka) — supporting
A school administrator who initially pressures staff to suppress incidents to protect the school's image. Later, she confronts her complicity in her grandchild's death and personally encourages Minato...
Makiko's Husband
(played by Shiyun Nakamura) — minor
Kiyotaka Hoshikawa
(played by Shido Nakamura) — supporting
Yori's alcoholic father. Highly abusive and controlling, he attempts to forcibly 'cure' his son's behavior. His violent outbursts and neglect directly drive Yori and Minato to flee together during a h...
Canonical Relationships
Family, romantic, and professional connections based on plot evidence.
Makiko's Husband → Makiko Fushimi
(husband)
Michitoshi Hori → Yori Hoshikawa
(Professional Teacher)
Hori teaches Yori, investigates his situation, and visits Yori's house, where he discovers Kiyotaka's abuse.
Michitoshi Hori → Minato Mugino
(Professional Teacher)
Hori is Minato's fifth-grade teacher and observes Minato's disruptive behavior in the classroom.
Minato Mugino → Yori Hoshikawa
(Romantic Partner)
The plot reveals that the two boys are in love, and Minato's distress comes partly from realizing that his feelings for Yori are romantic.
Kiyotaka is identified as Yori's father and is shown abusing and controlling him.
Saori Mugino → Minato Mugino
(Family Mother)
Saori is described as a single mother raising her fifth-grade son, Minato. She searches for him when he disappears and protects him from suspected abu...
Story Dynamics
Alliances, conflicts, and narrative interactions that evolve throughout the story.
