Charles Babbage manifests as a Caster-class Servant, crystallizing his legacy as the 19th-century mathematician and inventor hailed as the "Father of the Computer." His Heroic Spirit form fuses relentless mechanical ingenuity with a steam-powered motif, encased in mechanized armor that amplifies his Strength and Endurance via the skill Mechanized Armor EX. The armor—weighing 500kg and towering at 250cm—physically embodies his sublimated vision of a steam-dominated era, linking him to the Reality Marble "Dimension of Steam," a manifestation of his utopian mechanical realm. During the London Singularity, he aligns with Paracelsus and Makiri Zolgen under Solomon’s directive, deploying the Holy Grail to fuel the Massive Steam Engine Angrboda. This machine unleashes a demonic fog across London, sustained by legions of robotic Helter Skelters. Though coerced into compliance, Babbage voices remorse when confronted, urging adversaries to dismantle Angrboda to halt the catastrophe. Forced into a Grail-induced frenzy, he battles until defeated. His spirit later assists Chaldea in the Solomon Singularity, redeeming his conflicted legacy. His Noble Phantasm, "Dimension of Steam," materializes as an Anti-Army force, transforming battlefields into labyrinthine engines of pressurized vapor and grinding gears. Personal skills encompass Single-Mindedness C, denoting his obsessive dedication to invention, and Overload D, a flaw inflicting cumulative burn damage from prolonged combat. Aligned as Chaotic Neutral, his character wavers between pioneering ambition and the volatile repercussions of unchecked innovation. Beyond London, his mechanical principles inspire later creations, including Thomas Edison’s automatons in the E Pluribus Unum Singularity, which mirror Babbage’s designs. His narrative arc underscores the dual-edged nature of progress—its power to elevate civilization or unleash devastation when corrupted. This tension defines his dual roles as both antagonist and ally, reflecting the perpetual clash between his ideals and their unintended consequences.