Shusaku Ito emerges from ELF Corporation's 1997 adult visual novel as a low-life criminal who assumes the identity of an elderly man named Kato. This deception secures him the role of dormitory manager at Shukusei Music Academy, an exclusive institution for affluent young women, granting him fraudulent access to students and staff. Operating from this position of authority, he systematically targets female students and staff for blackmail and sexual exploitation. His methodology relies on meticulous observation of victims' routines to plant hidden cameras in private spaces, capturing compromising material used to coerce non-consensual acts. He leverages persistence, opportunism, and manipulation to advance his predatory agenda. A defining trait is his tendency to break the fourth wall, directly addressing the player and acknowledging their control over his actions. This meta-narrative converges in the game's Golden Ending: after victimizing multiple targets, his final confrontation with a student named Eri unravels when she reveals awareness of both surveillance devices and the player's existence. Her declaration of love for the player fractures reality, erasing Shusaku from existence and triggering a time loop that nullifies his crimes. His characterization features self-justification narratives—depicting himself as a victim of circumstance or accusing women of mistreatment—contradicted by his negligent duties and singular focus on predation. He imposes pragmatic limits, like avoiding lethal doses of aphrodisiacs, while animal motifs (notably flies) underscore his intrusive persistence. Though he denies being a "lolicon" when targeting younger-appearing victims, his actions remain consistently exploitative. Adapted into OVAs including *Shusaku the Letch* (1999) and *Shusaku the Letch: Liberty* (2003), these iterations strictly derive from the source material without expanding his background or development. The core narrative persists across media: deception, predation, and erasure via the Golden Ending's paradox.