
Protagonist
Dr. Kenzo Tenma
A Japanese surgeon whose one act of conscience costs him everything — and who refuses to stop being good.


モンスター
MAL score and studio: original / first tv season (or film), not franchise totals. Snapshot: November 2026.
The story
Brilliant surgeon Dr. Kenzo Tenma saves a young boy's life over the mayor's, destroying his career. Years later, that boy — Johan Liebert — has grown into a charismatic serial killer, and Tenma is the only one who knows. He sets out across Germany to kill the monster he saved, while police suspect Tenma himself.

Protagonist
A Japanese surgeon whose one act of conscience costs him everything — and who refuses to stop being good.

Deuteragonist
Johan's twin sister, a law student with buried memories, hunting her brother for her own reasons.

Antagonist
The 'monster' — a man of terrifying charisma who erases his own existence and drives others to ruin and suicide.

Detective
A robotic, brilliant detective convinced Tenma is the killer.

Ex-fiancée
Tenma's bitter ex, whose life unravels alongside his.

Boy
A boy Tenma saves from abuse, proof of what Tenma fights for.

Ally
A cheerful man hiding a fractured past from the same orphanage as Johan.