Silver, an anthropomorphic pig pirate, reigns as the primary antagonist in the 1971 anime adaptation. Once a crewman under the notorious Captain Flint, he obsessively pursues Flint’s buried treasure to establish supremacy over rival pirate factions. His distinctive appearance features a skull-embellished hat, a groomed mustache, and a hooked prosthetic replacing his left hand—a deliberate departure from classic depictions highlighting a missing leg.

Guided by insatiable greed, he orchestrates schemes laced with manipulation and treachery. After seizing Jim Hawkins and allies during their quest, he pivots between betraying his own crew and deceiving the protagonists, leveraging fear to command loyalty. This fragile authority crumbles when his men revolt upon discovering his refusal to divide the spoils.

The climax unfolds at a volcanic island, where Silver coerces Kathy, Flint’s granddaughter, into disclosing the treasure’s whereabouts. Trusting her guidance, he triggers a device that empties the crater lake—a miscalculation that floods the island, hurling him and his simulant partner, Spider, into the ocean. Though the treasure is salvaged from Flint’s submerged vessel, Silver emerges empty-handed.

Devoid of redeeming qualities or moral nuance, his persona remains unwaveringly ruthless. His ambitions and past are anchored exclusively to the film’s narrative, with no supplementary lore or media elaborating his history beyond the treasure hunt’s events.