Ryousuke Sugano

About Sugano, Ryousuke

Ryousuke Sugano is the main antagonist of Oshi no Ko, though his role is less a traditional villain and more a tragedy—a deeply unstable shut-in who became fatally obsessed with idol Ai Hoshino. His apartment was essentially a shrine to her, plastered with posters, which says everything about the intensity of his fixation. Sugano represents the darker side of parasocial fandom. Isolated and emotionally desperate, he turned to idols as a substitute for genuine human connection and love. When he discovered that Ai had secretly given birth to twins, he felt fundamentally betrayed—as though she'd personally lied to him. The revelation sent him into a violent spiral. He made two attempts on her life. The first time, he killed Gorou Amamiya, the doctor who got in his way and who knew about Ai's pregnancy. On his second attempt, Sugano succeeded in murdering Ai. But the aftermath is where his character becomes especially tragic: he learned that Ai had never even known his name. Whatever he'd imagined about their connection was entirely one-sided. That realization, the full weight of what he'd done for nothing, apparently broke him completely. He fled the scene and took his own life rather than face arrest. It's a dark exploration of how isolation, obsession, and untreated mental illness can cascade into irreversible violence.

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